Add new REST endpoint:

- /v2/server/rawcmd

Takes parameters:
 - cmd

Commands have to start with /, some commands aren't written properly, and may not return any more output than a status code.

TShockAPI/TSPlayer.cs

@@ -405,6 +405,36 @@ namespace TShockAPI
 		}
 	}
 
+	public class TSRestPlayer : TSServerPlayer
+	{
+		internal List<string> CommandReturn = new List<string>();
+
+		public TSRestPlayer()
+		{
+			Group = new SuperAdminGroup();
+		}
+
+		public override void SendMessage(string msg)
+		{
+			SendMessage(msg, 0, 255, 0);
+		}
+
+		public override void SendMessage(string msg, Color color)
+		{
+			SendMessage(msg, color.R, color.G, color.B);
+		}
+
+		public override void SendMessage(string msg, byte red, byte green, byte blue)
+		{
+			CommandReturn.Add(msg);
+		}
+
+		public List<string> GetCommandOutput()
+		{
+			return CommandReturn;
+		}
+	}
+
 	public class TSServerPlayer : TSPlayer
 	{
 		public TSServerPlayer()