- add meta tags for author and keywords

- add content tab for managing table content with sample data templates
- add footer row support and styling options
- add border collapse and spacing controls
- implement fixed header option with sticky positioning
- add keyboard shortcuts section with `kbd` styling
- add checkered background pattern to preview area
- improve responsive design for mobile devices
- implement notification system with multiple types
- add auto-save functionality using localStorage
- enhance JavaScript with content type selection logic
- improve header with logo and navigation
- add version number to footer

Author: TobiasMue91