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

shared-types/src/lib/report.types.ts

@@ -0,0 +1,60 @@
+export enum ReportReason {
+  INAPPROPRIATE_CONTENT = "INAPPROPRIATE_CONTENT",
+  HARASSMENT = "HARASSMENT",
+  SPAM = "SPAM",
+  IMPERSONATION = "IMPERSONATION",
+  OFFENSIVE_NAME = "OFFENSIVE_NAME",
+  MALICIOUS_LINKS = "MALICIOUS_LINKS",
+  OTHER = "OTHER",
+}
+
+export enum ReportStatus {
+  PENDING = "PENDING",
+  REVIEWED = "REVIEWED",
+  DISMISSED = "DISMISSED",
+  ACTION_TAKEN = "ACTION_TAKEN",
+}
+
+export interface ProfileReport {
+  id:             string;
+  reportedUserId: string;
+  reporterId:     string;
+  reason:         ReportReason;
+  details:        string;
+  status:         ReportStatus;
+  reviewedBy?:    string;
+  reviewNotes?:   string;
+  createdAt:      Date;
+  updatedAt:      Date;
+}
+
+export interface ProfileReportWithUsers extends ProfileReport {
+  reportedUser: {
+    id:           string;
+    username:     string;
+    displayName?: string;
+    avatar?:      string;
+  };
+  reporter: {
+    id:           string;
+    username:     string;
+    displayName?: string;
+    avatar?:      string;
+  };
+  reviewer?: {
+    id:           string;
+    username:     string;
+    displayName?: string;
+  };
+}
+
+export interface CreateReportDto {
+  reportedUserId: string;
+  reason:         ReportReason;
+  details:        string;
+}
+
+export interface UpdateReportDto {
+  status:       ReportStatus;
+  reviewNotes?: string;
+}