feat: Add Cursor React example repo (Task 3.2)

Complete working example demonstrating Cursor + Skill Seekers workflow:

**Main Example (examples/cursor-react-skill/):**
- README.md (400+ lines) - Comprehensive guide with expected outputs
- generate_cursorrules.py - Automation script for complete workflow
- .cursorrules.example - Sample generated rules (React 18+ patterns)
- requirements.txt - Python dependencies

**Example Project (example-project/):**
- package.json - React 18 + TypeScript + Vite
- tsconfig.json - Strict TypeScript configuration
- src/App.tsx - Sample counter component
- src/index.tsx - React entry point
- README.md - Testing instructions

**Workflow Demonstrated:**
1. Scrape React docs → skill-seekers scrape
2. Package for Cursor → skill-seekers package --target claude
3. Extract and copy → unzip + cp to .cursorrules
4. Test in Cursor IDE with AI prompts

**Example Prompts Included:**
- useState hook patterns
- Data fetching with useEffect
- Custom hooks for validation
- TypeScript typing examples

Shows before/after comparison of AI suggestions with and without .cursorrules.

Updates: README.md + INTEGRATIONS.md (added Haystack to supported list)

examples/cursor-react-skill/example-project/README.md

@@ -0,0 +1,43 @@
+# Example React Project for Cursor
+
+Minimal React + TypeScript project to test Cursor AI with `.cursorrules`.
+
+## Setup
+
+```bash
+# Install dependencies
+npm install
+
+# Start development server
+npm run dev
+```
+
+## Testing Cursor AI
+
+Once you have `.cursorrules` in this directory, try these prompts in Cursor:
+
+### Basic Hooks
+- "Create a form component with validation"
+- "Add a useEffect to fetch user data"
+- "Create a custom hook for local storage"
+
+### TypeScript
+- "Add proper TypeScript types to this component"
+- "Create an interface for user data"
+
+### Performance
+- "Optimize this component with useMemo"
+- "Add React.memo to prevent re-renders"
+
+### Advanced
+- "Create a Context provider for theme management"
+- "Implement error boundary for this component"
+- "Add lazy loading for this route"
+
+## Comparing Results
+
+Try the same prompt with and without `.cursorrules` to see the difference!
+
+**Without .cursorrules**: Generic React code, may use outdated patterns
+
+**With .cursorrules**: Modern React 18+, proper TypeScript, best practices