Spring AI Add Thinking Config and Content Caching to the Google Gen AI Module

A new module has been added spring-ai-google-genai to support the Google Unified Gen AI SDK .

The module matches all of the Google Vertex Gemini module.

New features supported by Gemini 2.0 and 2.5 models are being added to this module: - support API Key - already available - Thinking Budget support - Content Caching support - etc

This issue has been opened in support of adding thinking budget and content caching to the spring-ai-google-genai module