feat(llm): add Cloudflare OpenAI Gateway support

[fanweixiao]

name: ai-zipper
host: 0.0.0.0
port: 9000

auth:
  type: token
  token: <YOMO_TOKEN>

bridge:
  ai:
    server:
      addr: localhost:8000
      provider: cloudflare_openai

    providers:
      cloudflare_openai:
        endpoint: https://gateway.ai.cloudflare.com/v1/<ID>/<Endpoint_Name>
        api_key: sk-<OpenAI_API_KEY>
        model: gpt-4-1106-preview

[vercel]

@fanweixiao is attempting to deploy a commit to the YoMo Team on Vercel.

A member of the Team first needs to authorize it.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 64.94%. Comparing base (7f08807) to head (79ee097).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #764      +/-   ##
==========================================
+ Coverage   64.48%   64.94%   +0.45%     
==========================================
  Files          43       44       +1     
  Lines        2506     2533      +27     
==========================================
+ Hits         1616     1645      +29     
+ Misses        776      775       -1     
+ Partials      114      113       -1     

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