feat(web): packages.wheels.dev static site (wheels-dev#2271) (wheels-dev#2278)

* docs(docs): add packages.wheels.dev site design spec (wheels-dev#2271)

Brainstorm output for the deferred wheels.dev half of wheels-dev#2271. Proposes a
fifth Astro static site alongside blog/api/guides under web/sites/,
deployed to Cloudflare Pages as wheels-packages, rebuilt via
repository_dispatch fired from the wheels-packages registry repo on
manifest merges. Card-grid listing, detail pages with rendered README
through the unified/remark/rehype pipeline. No runtime, build-time
fetch, fail-loud on registry errors.

* docs(docs): add implementation plan for packages.wheels.dev site

* feat(docs): scaffold packages.wheels.dev Astro site

* feat(docs): add vitest to web workspace for unit tests

* chore(docs): add uniform test script across all web sites

* feat(docs): add registry.ts build-time fetcher for packages site

* fix(docs): include URL in malformed-manifest error; document cwd gotcha

* feat(docs): add markdown.ts for sanitized README rendering

* test(docs): pin sanitizer behavior and empty-input handling

* feat(docs): add listing page + PackageCard for packages site

* fix(docs): use correct @wheels-dev/ui tokens; cache copy-button label

* feat(docs): add [name].astro detail page with version history and README

* fix(docs): add table caption; promote .visually-hidden to BaseLayout

* feat(docs): wire packages site into web-deploy matrix with registry dispatch

* test(docs): add visual-regression baselines for packages site

Adds two SITES entries (packages-index + packages-wheels-sentry) to the
visual-regression harness and captures their baseline PNGs. Without these
baselines the visual-regression CI job fails for the new packages.wheels.dev
site.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* fix(docs): guard against manifest.name vs directory-name drift

* test(docs): update packages visual baselines from CI (Linux rendering)

* feat(web): add packages.wheels.dev to shared header + footer nav

* test(web): refresh visual baselines after shared nav update

---------

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: bpamiri

.github/workflows/web-deploy.yml

@@ -11,6 +11,8 @@ on:
     paths:
       - 'web/**'
       - '.github/workflows/web-deploy.yml'
+  repository_dispatch:
+    types: [registry-updated]
 
 jobs:
   deploy:
@@ -26,7 +28,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        site: [landing, blog, guides, api]
+        site: ${{ github.event_name == 'repository_dispatch' && fromJSON('["packages"]') || fromJSON('["landing", "blog", "guides", "api", "packages"]') }}
 
     steps:
       - name: Checkout