docs: add FreeAIapikey connection example to connect-a-model

[keepuahead]

What

Adds a short "FreeAIapikey" connection example to the Connect-a-model page, alongside the existing Ollama / OpenRouter / Anthropic sections.

Details

• OpenAI-compatible gateway, base URL https://api.freeaiapikey.com/v1
• Models auto-discovered via the standard /models route (GET https://api.freeaiapikey.com/v1/models) — no manual list needed
• Model IDs already carry openai/ / anthropic/ prefixes, so no Prefix ID required

Notes

Full disclosure: I'm the founder of FreeAIapikey. Followed the exact structure of the existing sections; happy to trim or reformat if you'd rather keep this page to the minimal set of examples.

[keepuahead]

Thanks for taking a look. Understood if third-party gateway examples aren't wanted in this page — the TokenLab and Routerra issues suggest that's the policy, so no hard feelings.

If there IS a place where OpenAI-compatible gateways can be listed (awesome list, integrations page, etc.), happy to follow whatever format you prefer. Otherwise feel free to leave this closed.