Allow to override endpoints by configuration

[rmax]

Validations

• I believe this is a way to improve. I'll try to join the Continue Discord for questions
• I'm not able to find an open issue that requests the same enhancement

Problem

I’m trying to use CodeLlama deployed on databricks but the endpoint is /invocations rather than /completions, using OpenAI-compatible provided.

Solution

It would be useful if we could override the completion endpoint by configuration.

[RomneyDa]

Comment from duplicate #2763
https://discord.com/channels/1108621136150929458/1300903286060220469

Can't currently do fully custom endpoints that aren't compatible with e.g. openai, ollama without adding a provider in the codebase.
e.g. company.com/embeddings, company.com/conversation

baseUrl and apiUrl are nice but assume the endpoints match with e.g. ollama or openai

Solution
Add chatUrl, embeddingsUrl etc. or some other paradigm that would allow this

[RomneyDa]

Falls under meta llm-info + config #2769