Add support to list galleries with sort

lib/api/client.dart

@@ -43,6 +43,22 @@ enum ThumbnailAlign {
   static const bottom = right;
 }
 
+enum SortByGid {
+  none,
+  asc,
+  desc;
+  bool? toBool() {
+    switch (this) {
+      case SortByGid.asc:
+        return true;
+      case SortByGid.desc:
+        return false;
+      default:
+        return null;
+    }
+  }
+}
+
 @RestApi()
 abstract class _EHApi {
   factory _EHApi(Dio dio, {required String baseUrl}) = __EHApi;
@@ -130,6 +146,7 @@ abstract class _EHApi {
       {@Query("all") bool? all,
       @Query("offset") int? offset,
       @Query("limit") int? limit,
+      @Query("sort_by_gid") bool? sortByGid,
       @CancelRequest() CancelToken? cancel});
 
   @GET('/tag/{id}')

lib/api/client.g.dart

@@ -530,6 +530,7 @@ class __EHApi implements _EHApi {
     bool? all,
     int? offset,
     int? limit,
+    bool? sortByGid,
     CancelToken? cancel,
   }) async {
     const _extra = <String, dynamic>{};
@@ -537,6 +538,7 @@ class __EHApi implements _EHApi {
       r'all': all,
       r'offset': offset,
       r'limit': limit,
+      r'sort_by_gid': sortByGid,
     };
     queryParameters.removeWhere((k, v) => v == null);
     final _headers = <String, dynamic>{};