feat: enhance GeneralSettingsPage with tag management

- Added tag management functionality to the `GeneralSettingsPageClient`, including filtering, sorting, and CRUD operations for tags.
- Integrated a modal for creating and editing tags, improving user experience in managing task labels.
- Updated the `Header` component to replace the 'Tags' link with 'Manager'.
- Removed the deprecated `TagsPage` and `TagsPageClient` components to streamline the codebase.
- Adjusted data fetching in `page.tsx` to include initial tags alongside user preferences.

components/ui/Header.tsx

@@ -54,7 +54,6 @@ export function Header({ title = "TowerControl", subtitle = "Task Management", s
     { href: '/kanban', label: 'Kanban' },
     { href: '/daily', label: 'Daily' },
     { href: '/weekly-summary', label: 'Hebdo' },
-    { href: '/tags', label: 'Tags' },
     ...(isJiraConfigured ? [{ href: '/jira-dashboard', label: `Jira${jiraConfig?.projectKey ? ` (${jiraConfig.projectKey})` : ''}` }] : []),
     { href: '/settings', label: 'Settings' }
   ];