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>

docs/README.md

@@ -6,19 +6,23 @@ Enterprise-grade AI code review system for Gitea with automated issue triage, PR
 
 | Document | Description |
 |----------|-------------|
-| [Getting Started](getting-started.md) | Quick setup guide |
+| [**Installation**](../INSTALL.md) | **Automated setup wizard & installation guide** |
+| [Getting Started](getting-started.md) | Detailed setup walkthrough |
 | [Configuration](configuration.md) | All configuration options |
 | [Agents](agents.md) | Detailed agent documentation |
-| [Security](security.md) | Security scanning features |
+| [SECURITY](SECURITY.md) | Security best practices & scanning |
 | [API Reference](api-reference.md) | Client and agent APIs |
 | [Workflows](workflows.md) | Gitea workflow examples |
 | [Troubleshooting](troubleshooting.md) | Common issues and solutions |
+| [Enterprise](enterprise.md) | Enterprise features & compliance |
+| [CLAUDE](CLAUDE.md) | Claude Code integration guide |
 
 ## Quick Links
 
-- **Setup**: See [Getting Started](getting-started.md)
-- **Configuration**: See [Configuration](configuration.md)
-- **Enterprise Features**: See [Enterprise](enterprise.md)
+- **🚀 Installation**: See [../INSTALL.md](../INSTALL.md) - Automated setup wizard
+- **⚙️ Configuration**: See [Configuration](configuration.md)
+- **🏢 Enterprise Features**: See [Enterprise](enterprise.md)
+- **🔧 Troubleshooting**: See [Troubleshooting](troubleshooting.md)
 
 ## Architecture Overview