Initial commit: Multi-service AI agent system

- Frontend: Vite + React + TypeScript chat interface
- Backend: FastAPI gateway with LangGraph routing
- Knowledge Service: ChromaDB RAG with Gitea scraper
- LangGraph Service: Multi-agent orchestration
- Airflow: Scheduled Gitea ingestion DAG
- Documentation: Complete plan and implementation guides

Architecture:
- Modular Docker Compose per service
- External ai-mesh network for communication
- Fast rebuilds with /app/packages pattern
- Intelligent agent routing (no hardcoded keywords)

Services:
- Frontend (5173): React chat UI
- Chat Gateway (8000): FastAPI entry point
- LangGraph (8090): Agent orchestration
- Knowledge (8080): ChromaDB RAG
- Airflow (8081): Scheduled ingestion
- PostgreSQL (5432): Chat history

Excludes: node_modules, .venv, chroma_db, logs, .env files
Includes: All source code, configs, docs, docker files

.gitignore

@@ -0,0 +1,52 @@
+# Dependencies
+node_modules/
+.venv/
+__pycache__/
+*.pyc
+
+# Build outputs
+dist/
+dist-ssr/
+
+# Databases and vector stores
+chroma_db/
+*.sqlite3
+*.db
+
+# Logs
+logs/
+*.log
+npm-debug.log*
+yarn-debug.log*
+pnpm-debug.log*
+
+# Environment variables (secrets!)
+.env
+.env.local
+.env.*.local
+
+# IDE
+.vscode/*
+!.vscode/extensions.json
+.idea/
+.DS_Store
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?
+
+# Airflow runtime
+airflow/logs/
+airflow/config/
+airflow/plugins/
+
+# Testing
+.coverage
+htmlcov/
+.pytest_cache/
+
+# Project management files (not code)
+action.md
+ideas.org
+project_journal.org