- modernize css gradient generator with improved UI and functionality

  - add support for conic gradients and multiple color stops
  - implement preset gradients gallery
  - add copy button with visual feedback
  - improve responsive design and dark mode support
- overhaul memory match game with enhanced features and UX
  - implement level selection system with progression tracking
  - add game state modals (pause, win, lose)
  - add persistent high scores via localStorage
  - improve responsiveness and visual design
  - add timing-based challenge mechanics

Author: TobiasMue91