treewide(refactor): rename files to follow the same style

lib/models/requests/report_request.dart

@@ -1,15 +0,0 @@
-import "package:freezed_annotation/freezed_annotation.dart";
-part "report_request.freezed.dart";
-part "report_request.g.dart";
-
-@freezed
-abstract class ReportRequest with _$ReportRequest {
-  const factory ReportRequest({
-    required String roomId,
-    required String eventId,
-    String? reason,
-  }) = _ReportRequest;
-
-  factory ReportRequest.fromJson(Map<String, Object?> json) =>
-      _$ReportRequestFromJson(json);
-}