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.Api.Core/Controllers/AvatarDataController.cs

@@ -0,0 +1,48 @@
+using FSO.Common.Utils;
+using FSO.Server.Api.Core.Utils;
+using FSO.Server.Protocol.CitySelector;
+using Microsoft.AspNetCore.Cors;
+using Microsoft.AspNetCore.Mvc;
+using System;
+using System.Net;
+
+namespace FSO.Server.Api.Core.Controllers
+{
+    [EnableCors]
+    [Route("cityselector/app/AvatarDataServlet")]
+    [ApiController]
+    public class AvatarDataController : ControllerBase
+    {
+        public IActionResult Get()
+        {
+            var api = Api.INSTANCE;
+            var user = api.RequireAuthentication(Request);
+            
+            var result = new XMLList<AvatarData>("The-Sims-Online");
+
+            using (var db = api.DAFactory.Get())
+            {
+                var avatars = db.Avatars.GetSummaryByUserId(user.UserID);
+
+                foreach (var avatar in avatars)
+                {
+                    result.Add(new AvatarData
+                    {
+                        ID = avatar.avatar_id,
+                        Name = avatar.name,
+                        ShardName = api.Shards.GetById(avatar.shard_id).Name,
+                        HeadOutfitID = avatar.head,
+                        BodyOutfitID = avatar.body,
+                        AppearanceType = (AvatarAppearanceType)Enum.Parse(typeof(AvatarAppearanceType), avatar.skin_tone.ToString()),
+                        Description = avatar.description,
+                        LotId = avatar.lot_id,
+                        LotName = avatar.lot_name,
+                        LotLocation = avatar.lot_location
+                    });
+                }
+            }
+
+            return ApiResponse.Xml(HttpStatusCode.OK, result);
+        }
+    }
+}