Lots of additions and changes

TOOHUCardAPI/DTO/PlayerData/PlayerDataSaveCardGroupRequest.cs

@@ -0,0 +1,13 @@
+using Newtonsoft.Json;
+
+namespace TOOHUCardAPI.DTO.PlayerData
+{
+    public class PlayerDataSaveCardGroupRequest: AbstractPlayerTargetedRequest
+    {
+        public string UserId { get; set; }
+        [JsonProperty("group_key")]
+        public string GroupKey { get; set; }
+        [JsonProperty("group_data")]
+        public string GroupData { get; set; }
+    }
+}