Add two OpenAI-compatible API-key providers via the Gitlawb Opengateway
gateway at opengateway.gitlawb.com:
- gitlawb (alias glb): xiaomi-mimo endpoint with 5 MiMo models
- gitlawb-gmi (alias glb-gmi): gmi-cloud endpoint with 40+ models
including GPT-5.x, Claude 4.x, DeepSeek, Gemini, Qwen, GLM, Kimi
Both providers include CLI-mimicking headers (User-Agent, X-Title,
HTTP-Referer) to avoid upstream rate limiting. GMI Cloud provider
has passthroughModels enabled since model access varies per API key.
