Shared-skills section — 5 copy-ready prompt templates

The /skills/ section lands with five canonical team prompt templates, each one written to run on the local stack first and escalate to cloud only when the team explicitly asks for it. Each skill carries audience (employee / admin / agent-runtime), tier (local-task / local-heavy / cloud-heavy), tool requirements, cost estimate, and a copy-ready prompt block. Closes issue #3.

Added
  • /skills/ index with filter bar (audience + tier)
  • Five seed skills under src/content/skills/en/: summarize-email, rewrite-english, translate-fr, look-up-customer, draft-order-ack
  • Matching FR mirrors under src/content/skills/fr/ (10 detail pages across both locales)
  • src/components/SkillCard.astro, src/components/CopyBlock.astro, src/pages/skills/[slug].astro, src/scripts/copy.ts
  • i18n skills.* block in both src/i18n/en.ts and src/i18n/fr.ts
  • scripts/test-copy.mjs — Playwright smoke test that serves dist/ and asserts navigator.clipboard content on the copy button
Changed
  • src/site.config.tsSkills added to the main nav
  • src/content.config.tsskills_en + skills_fr collections registered with a typed schema (audience enum, tier enum, required prompt + summary)