feat: Implement GoogleProvider for Google Generative AI integration

- Added GoogleProvider class to handle chat completions with Google Gemini API.
- Implemented client initialization and response handling for streaming and non-streaming responses.
- Created utility functions for tool conversion, response parsing, and content extraction.
- Removed legacy tool conversion utilities from the tools module.
- Enhanced logging for better traceability of API interactions and error handling.

.gitignore

@@ -5,6 +5,7 @@ __pycache__/
 
 # Virtual environment
 env/
+.venv/
 
 # Configuration
 config/config.ini
@@ -20,4 +21,10 @@ config/mcp_config.json
 # resources
 resources/
 
-# __pycache__/
+# Ruff
+.ruff_cache/
+
+# Distribution / packaging
+dist/
+build/
+*.egg-info/