chore: initial release

lib/core/models/file_info.dart

@@ -0,0 +1,23 @@
+import 'package:freezed_annotation/freezed_annotation.dart';
+
+part 'file_info.freezed.dart';
+part 'file_info.g.dart';
+
+@freezed
+sealed class FileInfo with _$FileInfo {
+  const factory FileInfo({
+    required String id,
+    required String filename,
+    required String originalFilename,
+    required int size,
+    required String mimeType,
+    required DateTime createdAt,
+    required DateTime updatedAt,
+    String? userId,
+    String? hash,
+    Map<String, dynamic>? metadata,
+  }) = _FileInfo;
+
+  factory FileInfo.fromJson(Map<String, dynamic> json) =>
+      _$FileInfoFromJson(json);
+}