feat: add mock CV data and setup testing environment
- Created a mock CV data file for testing purposes.
- Added a setup file for testing with @testing-library/jest-dom.
- Implemented a ThemeProvider component to manage themes and favicons.
- Added unit tests for theme utility functions.
- Replaced JavaScript theme constants with TypeScript constants.
- Refactored theme hooks to TypeScript and improved favicon handling.
- Removed deprecated JavaScript files and replaced them with TypeScript equivalents.
- Introduced a new TypeScript types file for better type safety.
- Set up TypeScript configuration files for the project.
- Configured Vite for building and testing the project.
