v2.8.0 -- Gemini Native Function Call, and more!

What's Changed

• test: create comprehensive test suite for API endpoints by @Oaklight in #46
• Fix/embedding multiple index by @Oaklight in #47
• Fix/gemini native function calling by @Oaklight in #48
• Feature/model counting alias by @Oaklight in #49

Full Changelog: v2.7.10...v2.8.0