Initial project setup: NF Hotel Data Analysis API

- Add project structure with domain-driven design organization
- Implement FastAPI endpoints for hotel booking reports
- Add data cleaning, statistics, and LLM report generation services
- Include configuration management and security utilities
- Add repository layer for bookings and metadata access
- Setup testing framework with conftest.py
- Include example files and documentation

data/hotel_metadata.json

@@ -0,0 +1,8 @@
+{
+  "hotel": "NF Hotel",
+  "currency": "USD",
+  "room_types": {
+    "A": { "size": "Small", "standard_price_per_night": 20, "room_count": null },
+    "B": { "size": "Large", "standard_price_per_night": 25, "room_count": null }
+  }
+}