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>

.dockerignore

@@ -0,0 +1,7 @@
+.env
+.venv
+venv
+__pycache__
+*.py[cod]
+.git
+.agents