Removed NioTSO client and server

- NioTSO client isn't needed because we're using RayLib
- Added FreeSO's API server to handle most backend operations

server/FSO.Server.Database/DA/Users/IUsers.cs

@@ -0,0 +1,28 @@
+using FSO.Server.Database.DA.Utils;
+using System.Collections.Generic;
+
+namespace FSO.Server.Database.DA.Users
+{
+    public interface IUsers
+    {
+        User GetById(uint id);
+        List<User> GetByRegisterIP(string ip);
+        void UpdateConnectIP(uint id, string ip);
+        void UpdateBanned(uint id, bool banned);
+        void UpdateClientID(uint id, string cid);
+        User GetByUsername(string username);
+        UserAuthenticate GetAuthenticationSettings(uint userId);
+        PagedList<User> All(int offset = 0, int limit = 20, string orderBy = "register_date");
+        uint Create(User user);
+        void CreateAuth(UserAuthenticate auth);
+        User GetByEmail(string email);
+        void UpdateAuth(UserAuthenticate auth);
+        void UpdateLastLogin(uint id, uint last_login);
+
+        DbAuthAttempt GetRemainingAuth(uint user_id, string ip);
+        int FailedConsecutive(uint user_id, string ip);
+        int FailedAuth(uint attempt_id, uint delay, int failLimit);
+        void NewFailedAuth(uint user_id, string ip, uint delay);
+        void SuccessfulAuth(uint user_id, string ip);
+    }
+}