Request review: add FerryAPI to awesome-ai-api

[Sundry007]

Hi maintainers, I would like to request a review for adding FerryAPI to awesome-ai-api.

Basic info:

• Name: FerryAPI
• Website: https://www.ferryapi.io/
• Docs: https://www.ferryapi.io/docs
• Pricing: https://www.ferryapi.io/pricing
• API compatibility: OpenAI-compatible base URL / multi-model AI API gateway
• Operational fit: customer API keys, prepaid balance, quotas/rate controls, usage records, and developer docs for OpenAI-style SDK testing.

I noticed the contribution guide asks for active operation, transparent pricing, accessible signup/API endpoint, and verifiable per-model pricing. FerryAPI appears to fit the category, but I am not opening a full data PR yet because the repo probes entries daily and maintainers may prefer to verify first.

Disclosure: I am affiliated with FerryAPI growth/distribution work. Please review with extra scrutiny and close this if it does not meet your listing criteria.