feat: tools implementation

lib/core/models/tool.dart

@@ -0,0 +1,26 @@
+import 'package:freezed_annotation/freezed_annotation.dart';
+
+part 'tool.freezed.dart';
+
+@freezed
+sealed class Tool with _$Tool {
+  const Tool._();
+
+  const factory Tool({
+    required String id,
+    required String name,
+    String? description,
+    String? userId,
+    Map<String, dynamic>? meta,
+  }) = _Tool;
+
+  factory Tool.fromJson(Map<String, dynamic> json) {
+    return Tool(
+      id: json['id'] as String,
+      name: json['name'] as String,
+      description: json['description'] as String?,
+      userId: json['user_id'] as String?,
+      meta: json['meta'] as Map<String, dynamic>?,
+    );
+  }
+}