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/Transactions/SqlTransactions.cs

@@ -0,0 +1,16 @@
+using Dapper;
+
+namespace FSO.Server.Database.DA.Transactions
+{
+    public class SqlTransactions : AbstractSqlDA, ITransactions
+    {
+        public SqlTransactions(ISqlContext context) : base(context)
+        {
+        }
+
+        public void Purge(int day)
+        {
+            Context.Connection.Query("DELETE FROM fso_transactions WHERE day < @day", new { day = day });
+        }
+    }
+}