Add support for Kimi.com subscriptions

[Th0rgal]

Summary

Add support for Kimi.com (https://www.kimi.com/) as an AI provider in addition to the current providers (OpenAI, Spark, ZAI, Builtin).

Context

Kimi is a Chinese AI assistant developed by Moonshot AI (月之暗面). It offers a subscription model and provides API access via https://api.moonshot.cn/v1

Requirements

• Add Kimi as a new provider in the provider configuration
• Support the subscription model (API key based authentication)
• Include at least one model (e.g., Kimi K2)
• Ensure custom routing works properly with the new provider
• Test on dev deployment

Implementation Notes

• API Base URL: https://api.moonshot.cn/v1
• SDK: @ai-sdk/openai-compatible (same as other providers)
• Environment variable for API key: KIMI_API_KEY

Testing

Please verify:

1. Provider is recognized in opencode
2. Custom routing works with the new provider
3. Test on dev deployment before production release

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This issue is for tracking the implementation of Kimi.com support.

[github-actions]

This issue doesn't fully meet our contributing guidelines.

What needs to be fixed:

• No issue template was used. This appears to be a feature request, so please use the Feature Request template, which requires a verification checkbox, a description of the enhancement, and a title starting with [FEATURE]:

Please edit this issue to address the above within 2 hours, or it will be automatically closed.

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This issue might be a duplicate of existing issues. Please check:

• [FEATURE]:https://api.kimi.com/coding/ support #4124: Feature request for kimi.com/coding API support (open, very similar scope)
• Feature Request: Native Kimi (Moonshot AI) Authentication Support #12156: Feature request for native Kimi (Moonshot AI) authentication support (closed)

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[github-actions]

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