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/enterprise-ai-review.yml

@@ -0,0 +1,53 @@
+name: Enterprise AI Code Review
+
+on:
+  pull_request:
+    types: [opened, synchronize]
+
+jobs:
+  ai-review:
+    runs-on: ubuntu-latest
+
+    steps:
+      # Checkout the PR repository
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      # Checkout the CENTRAL AI tooling repo
+      - 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 the AI review
+      - name: Run Enterprise AI Review
+        env:
+          AI_REVIEW_TOKEN: ${{ secrets.AI_REVIEW_TOKEN }}
+          AI_REVIEW_REPO: ${{ {{PLATFORM}}.repository }}
+          AI_REVIEW_API_URL: {{API_URL}}
+          AI_REVIEW_PR_NUMBER: ${{ {{PLATFORM}}.event.pull_request.number }}
+
+          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 pr ${{ {{PLATFORM}}.repository }} ${{ {{PLATFORM}}.event.pull_request.number }} \
+            --title "${{ {{PLATFORM}}.event.pull_request.title }}"
+
+      # Fail CI on HIGH severity (optional)
+      - name: Check Review Result
+        if: failure()
+        run: |
+          echo "AI Review found HIGH severity issues. Please address them before merging."
+          exit 1