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/tso.common/Utils/LinqUtils.cs

@@ -0,0 +1,15 @@
+using System.Collections.Generic;
+using System.Linq;
+
+namespace FSO.Common.Utils
+{
+    public static class LinqUtils
+    {
+        public static IEnumerable<IEnumerable<T>> Batch<T>(this IEnumerable<T> items, int maxItems)
+        {
+            return items.Select((item, index) => new { item, index })
+                        .GroupBy(x => x.index / maxItems)
+                        .Select(g => g.Select(x => x.item));
+        }
+    }
+}