Description of the Change

This change revamps the whole UI and replaces the opinionated Spectre.css with Tailwind.css. Several improvements were made along the way. Also Yarn v3 was tested, but I decided to go back to NPM (committing actual dependency files just doesn't seem right).

Benefits

• Improved maintainability and extendabililty of styles and components
• Improved maintainability of code (more components, kebab-case component names and tag attributes, structured and sorted code fragments, shorter locs)
• Improved UX with more consistent transitions
• Improved handling of keyboard shortcuts (no element focus required anymore)
• Migrated ion-icons to tabler-icons
• Improved and extended table column filters
• Improved responsiveness, especially on presentation modes

Applicable Issues

Closes #155, #160, #30