Play Framework

Replace all custom CSS with Tailwind CSS (Phase 2 & 3)

Convert all framework modules from custom CSS to Tailwind CSS
utility classes, using a pre-built CSS file generated by the
Tailwind standalone CLI (no Node.js required for end users).

Modules converted:
- Secure: login form layout with flex-based field alignment
- CRUD: admin layout, data tables, forms, pagination, search,
  all 17 tag templates
- Test runner: fixed header, test list, status indicators,
  selenium overlay (kept dynamic state styles as inline <style>)
- Console: dark theme with colored headings, output formatting
- Doc viewer: two-column layout, sidebar, wiki prose styling
  (kept .wikistyle prose rules as inline <style> since they
  style Textile/Markdown rendered content)
- Error pages (500, 404): compilation error display, source
  code highlighting

Infrastructure:
- framework/tailwind/input.css: Tailwind v4 config with custom
  theme colors (play-green, admin-blue, test-pass/fail, etc.)
- framework/tailwind/build-css.sh: build script using standalone CLI
- framework/public/stylesheets/play-tailwind.css: pre-built output
  (19KB minified), committed so users need no build tools
- tailwindcss binary gitignored (dev-only tool)

Deleted ~1,065 lines of custom CSS across 8 CSS files.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>