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/Enum/LotCategory.cs

@@ -0,0 +1,20 @@
+namespace FSO.Common.Enum
+{
+    public enum LotCategory
+    {
+        none = 0,
+        money = 1,
+        offbeat = 2,
+        romance = 3,
+        services = 4,
+        shopping = 5,
+        skills = 6,
+        welcome = 7,
+        games = 8,
+        entertainment = 9,
+        residence = 10,
+        community = 11, //cannot be set by users
+
+        recent = 255 //for filter searches
+    }
+}