Create new LLM provider
POST /v3/llm-gateway/providersDelete LLM provider
DELETE /v3/llm-gateway/providers/{provider}Get available provider options
GET /v3/llm-gateway/providers/optionsGet the models a provider offers
GET /v3/llm-gateway/providers/{provider}/available-modelsList LLM providers
GET /v3/llm-gateway/providersTest LLM connection
POST /v3/llm-gateway/test-connectionUpdate LLM provider
PUT /v3/llm-gateway/providers/{provider}