- Delete ConversionHistory component
- Remove history-related logic and state from MainConverter
- Clean up history imports and types in CommandPalette and storage utilities
- Remove history storage functions from lib/units/storage.ts
- Add Figlet text converter with font selection and history
- Add Pastel color palette generator and manipulation suite
- Add comprehensive Units converter with category-based logic
- Introduce AppShell with Sidebar and Header for navigation
- Modernize theme system with CSS variables and new animations
- Update project configuration and dependencies
