[Vector DB] New onboarding and home page (elastic#267351)

## Summary

This adds an initial onboarding flow for our new Vector DB project type.
Key things to look at:

- Two short onboarding paths focused on code samples
- ES URL and API key visible at all times
- Side-nav changes, Discover and Dashboards go under Data Management
- Home page with stats
- Full-page takeover for chat

### Testing

To run this locally:
- [Follow the instructions in the EIS script
README](https://github.com/elastic/kibana/blob/e3e1f20dd69a19e01cb4330b2a2c6fd0b3df0a92/x-pack/platform/packages/shared/kbn-inference-cli/README.md#eis)
to get vault access so you can run the EIS script locally.
- Start ES serverless with an elasticsearch project: `yarn es serverless
--projectType elasticsearch --clean --kill` and ensure you use the `-E
xpack.inference.elastic.url` flag with the value mentioned in the EIS
script README
- Start Kibana in serverless VectorDB project mode: `yarn serverless
vectordb`
- Run the EIS script with the command specified in the README

### Checklist

Check the PR satisfies following conditions. 

Reviewers should verify this PR satisfies this list as well.

- [x] Any text added follows [EUI's writing
guidelines](https://elastic.github.io/eui/#/guidelines/writing), uses
sentence case text and includes [i18n
support](https://github.com/elastic/kibana/blob/main/src/platform/packages/shared/kbn-i18n/README.md)
- [ ]
[Documentation](https://www.elastic.co/guide/en/kibana/master/development-documentation.html)
was added for features that require explanation or tutorials
- [x] [Unit or functional
tests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)
were updated or added to match the most common scenarios
- [x] If a plugin configuration key changed, check if it needs to be
allowlisted in the cloud and added to the [docker
list](https://github.com/elastic/kibana/blob/main/src/dev/build/tasks/os_packages/docker_generator/resources/base/bin/kibana-docker)
- [x] The PR description includes the appropriate Release Notes section,
and the correct `release_note:*` label is applied per the
[guidelines](https://www.elastic.co/guide/en/kibana/master/contributing.html#kibana-release-notes-process)
- [x] Review the [backport
guidelines](https://docs.google.com/document/d/1VyN5k91e5OVumlc0Gb9RPa3h1ewuPE705nRtioPiTvY/edit?usp=sharing)
and apply applicable `backport:*` labels.

---------

Co-authored-by: kibanamachine <42973632+kibanamachine@users.noreply.github.com>
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: 3 people

.github/CODEOWNERS

@@ -483,6 +483,7 @@ src/platform/packages/shared/deeplinks/observability @elastic/observability-ui
 src/platform/packages/shared/deeplinks/search @elastic/search-kibana
 src/platform/packages/shared/deeplinks/security @elastic/security-solution
 src/platform/packages/shared/deeplinks/shared @elastic/appex-sharedux
+src/platform/packages/shared/deeplinks/vectordb @elastic/search-kibana
 src/platform/packages/shared/deeplinks/workflows @elastic/workflows-eng
 src/platform/packages/shared/deeplinks/workplace_ai @elastic/search-kibana
 src/platform/packages/shared/feedback-components @elastic/appex-sharedux
@@ -1362,6 +1363,7 @@ x-pack/solutions/security/test/plugin_functional/plugins/resolver_test @elastic/
 x-pack/solutions/security/test/security_solution_api_integration @elastic/security-detection-engine
 x-pack/solutions/security/test/security_solution_api_integration/config/services/detections_response @elastic/security-detection-engine
 x-pack/solutions/security/test/security_solution_endpoint @elastic/security-defend-workflows
+x-pack/solutions/vectordb/packages/kbn-vectordb-onboarding @elastic/search-kibana
 x-pack/solutions/vectordb/plugins/serverless_vectordb @elastic/search-kibana
 x-pack/solutions/workplaceai/plugins/serverless_workplace_ai @elastic/search-kibana @elastic/workchat-eng
 x-pack/solutions/workplaceai/plugins/workplace_ai_app @elastic/search-kibana @elastic/workchat-eng

.i18nrc.json

@@ -133,6 +133,7 @@
     "searchIndexDocuments": "x-pack/solutions/search/packages/kbn-search-index-documents",
     "searchResponseWarnings": "src/platform/packages/shared/kbn-search-response-warnings",
     "searchTypes": "src/platform/packages/shared/kbn-search-types",
+    "vectordbOnboarding": "x-pack/solutions/vectordb/packages/kbn-vectordb-onboarding",
     "securitySolutionPackages": [
       "x-pack/solutions/security/packages/data-table",
       "x-pack/solutions/security/packages/ecs-data-quality-dashboard",

package.json

@@ -589,6 +589,7 @@
     "@kbn/deeplinks-search": "link:src/platform/packages/shared/deeplinks/search",
     "@kbn/deeplinks-security": "link:src/platform/packages/shared/deeplinks/security",
     "@kbn/deeplinks-shared": "link:src/platform/packages/shared/deeplinks/shared",
+    "@kbn/deeplinks-vectordb": "link:src/platform/packages/shared/deeplinks/vectordb",
     "@kbn/deeplinks-workflows": "link:src/platform/packages/shared/deeplinks/workflows",
     "@kbn/deeplinks-workplace-ai": "link:src/platform/packages/shared/deeplinks/workplace_ai",
     "@kbn/default-tracer": "link:src/platform/packages/shared/kbn-default-tracer",
@@ -1247,6 +1248,7 @@
     "@kbn/utils": "link:src/platform/packages/shared/kbn-utils",
     "@kbn/ux-plugin": "link:x-pack/solutions/observability/plugins/ux",
     "@kbn/v8-profiler-examples-plugin": "link:examples/v8_profiler_examples",
+    "@kbn/vectordb-onboarding": "link:x-pack/solutions/vectordb/packages/kbn-vectordb-onboarding",
     "@kbn/vis-default-editor-plugin": "link:src/platform/plugins/private/vis_default_editor",
     "@kbn/vis-type-gauge-plugin": "link:src/platform/plugins/private/vis_types/gauge",
     "@kbn/vis-type-heatmap-plugin": "link:src/platform/plugins/private/vis_types/heatmap",

packages/kbn-optimizer/limits.yml

@@ -170,7 +170,7 @@ pageLoadAssetSize:
   serverless: 7412
   serverlessObservability: 19104
   serverlessSearch: 26287
-  serverlessVectordb: 4389
+  serverlessVectordb: 7618
   serverlessWorkplaceAI: 4855
   sessionView: 47912
   share: 64066

src/core/packages/chrome/browser/moon.yml

@@ -31,6 +31,7 @@ dependsOn:
   - '@kbn/deeplinks-fleet'
   - '@kbn/deeplinks-shared'
   - '@kbn/deeplinks-workplace-ai'
+  - '@kbn/deeplinks-vectordb'
   - '@kbn/projects-solutions-groups'
   - '@kbn/deeplinks-workflows'
   - '@kbn/deeplinks-agent-builder'

src/core/packages/chrome/browser/src/project_navigation.ts

@@ -35,6 +35,7 @@ import type { AppId as SecurityApp, DeepLinkId as SecurityLink } from '@kbn/deep
 import type { AppId as FleetApp, DeepLinkId as FleetLink } from '@kbn/deeplinks-fleet';
 import type { AppId as SharedApp, DeepLinkId as SharedLink } from '@kbn/deeplinks-shared';
 import type { WorkplaceAIApp, DeepLinkId as WorkplaceAILink } from '@kbn/deeplinks-workplace-ai';
+import type { VectordbApp, DeepLinkId as VectordbLink } from '@kbn/deeplinks-vectordb';
 import type { DeepLinkId as AgentBuilderLink } from '@kbn/deeplinks-agent-builder';
 import type { AppId as WorkflowsApp, DeepLinkId as WorkflowsLink } from '@kbn/deeplinks-workflows';
 import type { KibanaProject } from '@kbn/projects-solutions-groups';
@@ -59,6 +60,7 @@ export type AppId =
   | FleetApp
   | SharedApp
   | WorkplaceAIApp
+  | VectordbApp
   | WorkflowsApp;
 
 /** @public */
@@ -73,6 +75,7 @@ export type AppDeepLinkId =
   | FleetLink
   | SharedLink
   | WorkplaceAILink
+  | VectordbLink
   | AgentBuilderLink
   | WorkflowsLink;
 

src/core/packages/chrome/browser/tsconfig.json

@@ -26,6 +26,7 @@
     "@kbn/deeplinks-fleet",
     "@kbn/deeplinks-shared",
     "@kbn/deeplinks-workplace-ai",
+    "@kbn/deeplinks-vectordb",
     "@kbn/projects-solutions-groups",
     "@kbn/deeplinks-workflows",
     "@kbn/deeplinks-agent-builder",

src/platform/packages/shared/deeplinks/vectordb/constants.ts

@@ -0,0 +1,10 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the "Elastic License
+ * 2.0", the "GNU Affero General Public License v3.0 only", and the "Server Side
+ * Public License v 1"; you may not use this file except in compliance with, at
+ * your election, the "Elastic License 2.0", the "GNU Affero General Public
+ * License v3.0 only", or the "Server Side Public License, v 1".
+ */
+
+export const VECTORDB_APP_ID = 'vectordb';

src/platform/packages/shared/deeplinks/vectordb/deep_links.ts

@@ -0,0 +1,16 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the "Elastic License
+ * 2.0", the "GNU Affero General Public License v3.0 only", and the "Server Side
+ * Public License v 1"; you may not use this file except in compliance with, at
+ * your election, the "Elastic License 2.0", the "GNU Affero General Public
+ * License v3.0 only", or the "Server Side Public License, v 1".
+ */
+
+import type { VECTORDB_APP_ID } from './constants';
+
+export type VectordbApp = typeof VECTORDB_APP_ID;
+
+export type VectordbLinkId = 'tutorials';
+
+export type DeepLinkId = VectordbApp | `${VectordbApp}:${VectordbLinkId}`;

src/platform/packages/shared/deeplinks/vectordb/index.ts

@@ -0,0 +1,11 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the "Elastic License
+ * 2.0", the "GNU Affero General Public License v3.0 only", and the "Server Side
+ * Public License v 1"; you may not use this file except in compliance with, at
+ * your election, the "Elastic License 2.0", the "GNU Affero General Public
+ * License v3.0 only", or the "Server Side Public License, v 1".
+ */
+
+export type { DeepLinkId, VectordbApp } from './deep_links';
+export { VECTORDB_APP_ID } from './constants';