feat: add reviews content collection

Move all 24 review entries from skills-review/catalog.js +
skills-review/submitted-catalog.js into a typed Astro content collection at
src/content/reviews/. Each entry is a Markdown file with frontmatter for the
review metadata (id, author, focus, wins, improve, extras, name, description)
and a body that holds the 'improved' SKILL.md content.

Re-point scripts/build-skill-review.mjs at the new collection. The generator
reads each .md file, parses its YAML frontmatter, and writes
skill-reviews/improved/{id}/SKILL.md in the same shape the legacy catalog
produced — verified byte-identical via 'git diff --exit-code skill-reviews/'.

The 'name' field is preserved separately from 'id' because two entries
renamed the skill during review (id angular-accessibility-root → name
angular-accessibility; id confectionary-skill-hub → name confectionery-orders).
Without it the generator output would drift on those two files.

Does not yet delete skills-review/catalog.js or submitted-catalog.js —
verify.mjs and the legacy review-desk page both still read them, so they
stay as a mirror until task 16 rewires the page to the collection. Adding a
new submission today requires editing both the .md file (new source of
truth) and the legacy catalog.js (until task 16).

Done-when:
- 24 entries under src/content/reviews/ ✓
- verify.mjs's id:' count assertion still passes ✓
- git diff --exit-code skill-reviews/ clean after regenerating ✓
- astro check passes (22 files: 0 errors, 0 warnings, 2 hints) ✓

Co-Authored-By: Claude Code <noreply@anthropic.com>

src/content/reviews/lunch-time.md

@@ -0,0 +1,40 @@
+---
+author: 'Vinicius Nascimento'
+description:
+  'Record the start of a Long Day Factory lunch break. Use when the user
+  explicitly says they are starting lunch.'
+extras: 'Share one state schema and add a test for duplicate lunch starts.'
+focus: 'Record the beginning of a lunch break.'
+id: 'lunch-time'
+improve:
+  - 'Treat “going to lunch” as write authorization but keep queries
+    non-mutating.'
+  - 'Use a package-relative script path.'
+  - 'Prevent overwriting an existing open lunch without confirmation.'
+name: 'lunch-time'
+path: '../submitted-skills/Vinicius%20Nascimento/skills/lunch-time/SKILL.md'
+status: 'Good companion set'
+title: 'Lunch time'
+wins:
+  - 'Narrow purpose and clear relationship to the suite.'
+  - 'Handles missing start state gracefully.'
+---
+
+# lunch-time
+
+## Workflow
+
+1. Confirm the request records a lunch start now.
+2. Check for a started shift and an existing open lunch.
+3. If an open lunch exists, ask before replacing it; otherwise run
+   `bash scripts/lunch.sh`.
+
+## Rules
+
+- This command changes local state; do not run it for a question about lunch
+  time.
+- Use `references/state.md` for recovery rules.
+
+## Output
+
+Confirm the lunch timestamp and any missing or conflicting state.