Enhance Swagger UI styles for light and dark modes

- Refactored CSS for Swagger UI to improve responsiveness and visual consistency across light and dark themes.
- Updated button styles, input fields, and modal layouts for better user experience.
- Added unified styling for response sections, including headers and code blocks, ensuring readability and aesthetic appeal.
- Implemented rounded corners for tables and opblock cards to enhance the overall design.

Files changed:
- src/styles/swagger-overrides.css: Comprehensive updates to styling for light and dark modes.

Author: QSchlegel