refactor: improve naming conventions and optimize assets
- Rename color variables in tailwind.config.js for better naming practices
- Remove unused color definitions
- Rename github-card.js to github.js for consistency
- Enhance github.js with loading states and improved error handling
- Create organized directory for signature assets
- Optimize signatures to webp format with reduced file size
- Add rel attributes to links in index.html to resolve console errors
Full Changelog: v1.3.2...v1.3.3