Initial commit: cross-platform MiMo-to-Anthropic local gateway

Adds a FastAPI-based local proxy that remaps Claude model IDs to Xiaomi
MiMo and forwards requests to MiMo's Anthropic-compatible API. Includes
launchers for Windows (start.ps1), macOS/Linux (start.sh), and Docker.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

requirements.txt

@@ -0,0 +1,4 @@
+fastapi
+uvicorn
+httpx
+python-dotenv