feat: [ISSUE] add support for Google Gemini models via Google AI Studio

[KuriaMaingi]

Is your feature request related to a problem? Please describe. The only option to use Google models is either via VertexAI - Gemini OR PALM. PALM API was deprecated and instead replaced with AI Studio. https://ai.google.dev/gemini-api/docs

Describe the solution you'd like Replace PALM support with AI Studio

Describe alternatives you've considered VertexAI is a different solution meant for enterprise & priced accordingly

Additional context None