Adopt VSCode 1.121.0 rebase

Replace working tree with the contents of the rebase/vscode-1.121.0 branch
(f8ec907) while preserving the full develop history as ancestors.

The rebase branch was built as an orphan from microsoft/vscode@main and
contains a clean 1.121.0 base plus all Roopik trees (extensions/roopik,
extensions/roopik-roo, src/vs/workbench/contrib/roopik, tools/roopik),
branding, patches, eslint exceptions, app.ts ROOPIK injection sites,
and CI workflow fixes (VSCODE_QUALITY=stable).

Tree source: f8ec907
Old develop tip preserved as ancestor: 7b94b1c
Original rebase landmark: rebase/vscode-1.121.0-promoted

Author: HumbleBee14

.agents/skills/launch/SKILL.md

@@ -1,5 +1,5 @@
-## DO NOT MODIFY THIS FILE MANUALLY. This is part of auto-baselining from 1ES Pipeline Templates. Go to [https://aka.ms/1espt-autobaselining] for more details.
-
+## DO NOT MODIFY THIS FILE MANUALLY. This is part of auto-baselining from 1ES Pipeline Templates. Go to [https://aka.ms/1espt-autobaselining] for more details.
+
 pipelines:
   111:
     retail:

.config/1espt/PipelineAutobaseliningConfig.yml

@@ -1,16 +1,35 @@
 **/build/*/**/*.js
-**/dist/**/*.js
+**/dist/**/*
 **/extensions/**/*.d.ts
 **/extensions/**/build/**
 **/extensions/**/colorize-fixtures/**
+**/extensions/copilot/coverage/**
+**/extensions/copilot/.esbuild/**
+**/extensions/copilot/.simulation/**
+**/extensions/copilot/.eslintplugin/**
+**/extensions/copilot/chat-lib/**
+**/extensions/copilot/test/simulation/fixtures/**
+**/extensions/copilot/test/scenarios/**
+**/extensions/copilot/test/aml/out/**
+**/extensions/copilot/src/util/vs/**
+**/extensions/copilot/src/platform/parser/test/node/fixtures/**
+**/extensions/copilot/src/extension/test/node/fixtures/**
+**/extensions/copilot/src/extension/prompts/node/test/fixtures/**
+**/extensions/copilot/src/extension/typescriptContext/serverPlugin/fixtures/**
+**/extensions/copilot/src/extension/typescriptContext/serverPlugin/lib/**
+**/extensions/copilot/src/extension/typescriptContext/serverPlugin/dist/**
+**/extensions/copilot/src/extension/completions-core/**/testdata/*
+**/extensions/copilot/.vscode/extensions/test-extension/dist/**
 **/extensions/css-language-features/server/test/pathCompletionFixtures/**
 **/extensions/html-language-features/server/lib/jquery.d.ts
 **/extensions/html-language-features/server/src/test/pathCompletionFixtures/**
 **/extensions/ipynb/notebook-out/**
 **/extensions/markdown-language-features/media/**
 **/extensions/markdown-language-features/notebook-out/**
 **/extensions/markdown-math/notebook-out/**
-**/extensions/mermaid-chat-features/chat-webview-out/**
+**/extensions/mermaid-markdown-features/chat-webview-out/**
+**/extensions/mermaid-markdown-features/markdown-preview-out/**
+**/extensions/mermaid-markdown-features/notebook-out/**
 **/extensions/notebook-renderers/renderer-out/index.js
 **/extensions/roopik-roo/**
 **/extensions/simple-browser/media/index.js
@@ -36,4 +55,5 @@
 **/test/automation/out/**
 **/typings/**
 **/.build/**
+**/.vscode-test/**
 !.vscode