Add automated setup system for easy installation

- Add setup.sh interactive wizard for 5-minute setup
- Add INSTALL.md comprehensive installation guide
- Add templates/workflows/ directory with parameterized workflow templates
- Update README.md with prominent Installation section
- Update docs/README.md with installation links

The setup wizard automates:
- Platform selection (Gitea/GitHub)
- Bot configuration
- LLM provider setup
- Workflow file generation
- Configuration file creation

Users can now add OpenRabbit to any repository in under 5 minutes.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

templates/workflows/ai-codebase-review.yml

@@ -0,0 +1,58 @@
+name: AI Codebase Quality Review
+
+on:
+  # Weekly scheduled run
+  schedule:
+    - cron: "0 0 * * 0" # Every Sunday at midnight
+
+  # Manual trigger
+  workflow_dispatch:
+    inputs:
+      report_type:
+        description: "Type of report to generate"
+        required: false
+        default: "full"
+        type: choice
+        options:
+          - full
+          - security
+          - quick
+
+jobs:
+  ai-codebase-review:
+    runs-on: ubuntu-latest
+
+    steps:
+      # Checkout the repository
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0 # Full history for analysis
+
+      # Checkout central AI tooling
+      - uses: actions/checkout@v4
+        with:
+          repository: {{OPENRABBIT_REPO}}
+          path: .ai-review
+          token: ${{ secrets.AI_REVIEW_TOKEN }}
+
+      # Setup Python
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+
+      # Install dependencies
+      - run: pip install requests pyyaml
+
+      # Run AI codebase analysis
+      - name: Run AI Codebase Analysis
+        env:
+          AI_REVIEW_TOKEN: ${{ secrets.AI_REVIEW_TOKEN }}
+          AI_REVIEW_REPO: ${{ {{PLATFORM}}.repository }}
+          AI_REVIEW_API_URL: {{API_URL}}
+
+          OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
+          OPENROUTER_API_KEY: ${{ secrets.OPENROUTER_API_KEY }}
+          OLLAMA_HOST: ${{ secrets.OLLAMA_HOST }}
+        run: |
+          cd .ai-review/tools/ai-review
+          python main.py codebase ${{ {{PLATFORM}}.repository }}