Messagepack (#12)

* add messagepack attributes

* fix isnullorempty

* bump api version

---------

Co-authored-by: rootdarkarchon <root.darkarchon@outlook.com>

MareSynchronosAPI/Dto/User/UserPairDto.cs

@@ -1,8 +1,10 @@
 using MareSynchronos.API.Data;
 using MareSynchronos.API.Data.Enum;
+using MessagePack;
 
 namespace MareSynchronos.API.Dto.User;
 
+[MessagePackObject(keyAsPropertyName: true)]
 public record UserPairDto(UserData User, UserPermissions OwnPermissions, UserPermissions OtherPermissions) : UserDto(User)
 {
     public UserPermissions OwnPermissions { get; set; } = OwnPermissions;