chore(workflow): add AI-assisted workflow commands and configurations

Add comprehensive workflow commands for AI-assisted development:
- Claude commands: analyze, clarify, plan
- Kilocode workflows: full feature development lifecycle
- Opencode commands: specification and implementation workflows
- Roo MCP configuration for tool integration

Update .gitignore to exclude .astro build cache directories.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

apps/backend/tailwind.config.mjs

@@ -1,13 +1,19 @@
 import tailwindcssAnimate from 'tailwindcss-animate'
 import typography from '@tailwindcss/typography'
 
+import tailwindcssAnimate from 'tailwindcss-animate'
+import typography from '@tailwindcss/typography'
+import sharedConfig from '@enchun/shared/tailwind-config-v3'
+
 /** @type {import('tailwindcss').Config} */
 const config = {
+  ...sharedConfig,
   content: [
     './pages/**/*.{ts,tsx}',
     './components/**/*.{ts,tsx}',
     './app/**/*.{ts,tsx}',
     './src/**/*.{ts,tsx}',
+    ...sharedConfig.content,
   ],
   darkMode: ['selector', '[data-theme="dark"]'],
   plugins: [tailwindcssAnimate, typography],