feat: Implement admin user management features

- Added adminCreateUser endpoint and corresponding DTO for creating users.
- Implemented deleteUser and resetPassword functionalities for admin users.
- Introduced updateEmail functionality for admin users.
- Updated UsersService to handle user creation, deletion, password reset, and email updates.
- Modified UsersController to include new admin routes with appropriate role checks.
- Refactored frontend navigation to link to user management under profile.
- Created new profile tabs for user management and database management.
- Developed AnvandareClient component for user management, including user creation, deletion, role changes, and password resets.
- Added DatabsTab for managing product listings and merging duplicates.
- Enhanced MinProfilTab for user profile management with form handling.

frontend/app/Navigation.tsx

@@ -35,7 +35,7 @@ export default async function Navigation() {
       <Link href="/baslager" style={linkStyle}>🏪 Baslager</Link>
       <Link href="/admin/products" style={linkStyle}>⚙️ Admin</Link>
       {(session?.user as any)?.role === 'admin' && (
-        <Link href="/admin/users" style={linkStyle}>👥 Användare</Link>
+        <Link href="/profil?tab=anvandare" style={linkStyle}>👥 Användare</Link>
       )}
       <Link href="/import" style={linkStyle}>📥 Importera</Link>
       <Link href="/matplan" style={linkStyle}>📅 Matplan</Link>