Refactor Google and OpenAI provider response handling and tool utilities

- Improved error handling and logging in Google response processing.
- Simplified streaming content extraction and error detection in Google provider.
- Enhanced content extraction logic in OpenAI provider to handle edge cases.
- Streamlined tool conversion functions for both Google and OpenAI providers.
- Removed redundant comments and improved code readability across multiple files.
- Updated context window retrieval and message truncation logic for better performance.
- Ensured consistent handling of tool calls and arguments in OpenAI responses.

pyproject.toml

@@ -87,7 +87,7 @@ skip-magic-trailing-comma = false
 combine-as-imports = true
 
 [tool.ruff.lint.mccabe]
-max-complexity = 16
+max-complexity = 30
 
 [tool.ruff.lint.flake8-tidy-imports]
 # Disallow all relative imports.