- Add "litellm" to supportedProviders in types.ts
- Add litellmBaseUrl to FlagOptions type
- Add LITELLM_API_KEY to environment variable mapping
- Add litellm case to getProviderSettings function
- Add --litellm-base-url CLI flag with default http://localhost:4000
- Add litellmBaseUrl to ExtensionHostOptions interface
- Add support for LITELLM_BASE_URL environment variable
- Add tests for LiteLLM provider functionality
- Update README with LiteLLM documentation
Closes#10839