feat: add UI components for skeleton, slider, sonner, switch, table, tabs, textarea, toggle group, toggle, tooltip, and mobile detection hook

- Implemented Skeleton component for loading states.
- Created Slider component using Radix UI for customizable sliders.
- Added Sonner component for toast notifications with theme support.
- Developed Switch component for toggle functionality.
- Introduced Table component with subcomponents for structured data display.
- Built Tabs component for tabbed navigation.
- Created Textarea component for multi-line text input.
- Implemented ToggleGroup and Toggle components for grouped toggle buttons.
- Added Tooltip component for displaying additional information on hover.
- Created useIsMobile hook for mobile device detection.
- Added utility functions for class name merging.
- Configured TypeScript settings for the project.

music-metadata-manager-frontend/.gitignore

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+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.*
+.yarn/*
+!.yarn/patches
+!.yarn/plugins
+!.yarn/releases
+!.yarn/versions
+
+# testing
+/coverage
+
+# next.js
+/.next/
+/out/
+
+# production
+/build
+
+# misc
+.DS_Store
+*.pem
+
+# debug
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+.pnpm-debug.log*
+
+# env files (can opt-in for committing if needed)
+.env*
+
+# vercel
+.vercel
+
+# typescript
+*.tsbuildinfo
+next-env.d.ts