Initial commit: PymesBot Demo with IA integration

- FastAPI backend with WebSocket chat
- SQLite database for products
- Z.AI (GLM-4.7) integration for AI responses
- Docker deployment ready
- Caddy proxy configuration

.gitignore

@@ -0,0 +1,8 @@
+__pycache__/
+*.pyc
+*.pyo
+.env
+*.db
+data/
+*.log
+.DS_Store