[Docs] Create comprehensive API documentation

[coderabbitai]

Overview

Document all APIs, services, and integration points.

Current State

• Type definitions documented
• No API documentation
• No integration guides

Requirements

• Document all service APIs: GitService, CredentialService, AgentOrchestrator, ChatService
• Create integration guides: GitHub, Anthropic/OpenAI, MCP server
• Add code examples for all APIs
• Document error codes and handling
• Create architecture diagrams
• Add API versioning strategy
• Generate TypeDoc documentation
• Create interactive API playground
• Document rate limits and quotas

Success Criteria

• Complete API reference available
• Clear integration examples
• Easy for developers to extend

Priority: MEDIUM

Estimated Effort: 3-4 days

Labels: documentation, priority:medium

Backlink: Related to PR #2

[google-labs-jules]

Jules is on it. When finished, you will see another comment and be able to review a PR.

[google-labs-jules]

Ready for a review! A PR has been created.