feat: upower rank page

Signed-off-by: bggRGjQaUbCoE <githubaccount56556@proton.me>

lib/models/upower_rank/user_info.dart

@@ -0,0 +1,39 @@
+class UserInfo {
+  int? mid;
+  String? nickname;
+  String? avatar;
+  int? rank;
+  int? day;
+  int? expireAt;
+  int? remainDays;
+
+  UserInfo({
+    this.mid,
+    this.nickname,
+    this.avatar,
+    this.rank,
+    this.day,
+    this.expireAt,
+    this.remainDays,
+  });
+
+  factory UserInfo.fromJson(Map<String, dynamic> json) => UserInfo(
+        mid: json['mid'] as int?,
+        nickname: json['nickname'] as String?,
+        avatar: json['avatar'] as String?,
+        rank: json['rank'] as int?,
+        day: json['day'] as int?,
+        expireAt: json['expire_at'] as int?,
+        remainDays: json['remain_days'] as int?,
+      );
+
+  Map<String, dynamic> toJson() => {
+        'mid': mid,
+        'nickname': nickname,
+        'avatar': avatar,
+        'rank': rank,
+        'day': day,
+        'expire_at': expireAt,
+        'remain_days': remainDays,
+      };
+}