Add apiBase to autocomplete model

[eleftherias]

This is needed for JetBrains IDEs.

Without this, the prompt will hang forever and the logs will show this message:

[info] Starting Continue core...
[2024-11-18T09:57:36] [info] Starting Continue core... 
[2024-11-18T09:57:36] Setup 
[2024-11-18T09:57:36] Core started 
[2024-11-18T09:57:37] HTTP 401 Unauthorized from https://api.openai.com/v1/models

{
  "error": {
    "message": "Incorrect API key provided: stlk_033*********************************************************1b9a. You can find your API key at https://platform.openai.com/account/api-keys.",
    "type": "invalid_request_error",
    "param": null,
    "code": "invalid_api_key"
  }
}

Code: undefined
Error number: undefined
Syscall: undefined
Type: undefined

Error: HTTP 401 Unauthorized from https://api.openai.com/v1/models

{
  "error": {
    "message": "Incorrect API key provided: stlk_033*********************************************************1b9a. You can find your API key at https://platform.openai.com/account/api-keys.",
    "type": "invalid_request_error",
    "param": null,
    "code": "invalid_api_key"
  }
}
    at customFetch (/snapshot/continue/binary/out/index.js:471442:17)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async withExponentialBackoff (/snapshot/continue/binary/out/index.js:471175:22)