Refactor and enhance UI components across multiple pages

- Improved import organization and formatting in PlaylistsPage, RegisterPage, SoundsPage, SettingsPage, and UsersPage for better readability.
- Added error handling and user feedback with toast notifications in SoundsPage and SettingsPage.
- Enhanced user experience by implementing debounced search functionality in PlaylistsPage and SoundsPage.
- Updated the layout and structure of forms in SettingsPage and UsersPage for better usability.
- Improved accessibility and semantics by ensuring proper labeling and descriptions in forms.
- Fixed minor bugs related to state management and API calls in various components.

src/index.css

@@ -1,5 +1,5 @@
-@import "tailwindcss";
-@import "tw-animate-css";
+@import 'tailwindcss';
+@import 'tw-animate-css';
 
 @custom-variant dark (&:is(.dark *));
 
@@ -117,4 +117,4 @@
   body {
     @apply bg-background text-foreground;
   }
-}
+}