feat: implement profile reporting system with admin review

Added comprehensive profile reporting system to allow users to report
inappropriate profiles and admins to review reports.

Features:
- User can report profiles with predefined reasons + custom details
- Duplicate prevention (one pending report per profile per user)
- Rate limiting (5 pending reports maximum per user)
- Admin dashboard to view and filter reports (All, Pending, Reviewed, etc.)
- Admin review modal to update status and add review notes
- Report button on profile page (only visible when viewing others)
- Font Awesome icons for better UI consistency

Database changes:
- New ProfileReport model with ReportReason/ReportStatus enums
- User relations for reports (reportsMade, reportsReceived, reportsReviewed)
- Indices for efficient querying

apps/frontend/src/app/app.routes.ts

@@ -41,6 +41,10 @@ export const appRoutes: Route[] = [
     path: 'admin/suggestions',
     loadComponent: () => import('./components/admin/admin-suggestions.component').then(m => m.AdminSuggestionsComponent)
   },
+  {
+    path: 'admin/reports',
+    loadComponent: () => import('./components/admin-reports/admin-reports.component').then(m => m.AdminReportsComponent)
+  },
   {
     path: 'my-suggestions',
     loadComponent: () => import('./components/my-suggestions/my-suggestions.component').then(m => m.MySuggestionsComponent)