Prevent installer from closing via ctrl+c while server remains open

This allows tshock to handle CancelKeyPress as per normal, instead of closing the parent process, leaving the second trigger to never be reached.
see https://github.com/Pryaxis/TShock/blob/general-devel/TShockAPI/TShock.cs#L710

TShockInstaller/Program.cs

@@ -95,7 +95,14 @@ Console.WriteLine($"To be able to run {tshock_path} yourself set the environment
 Environment.SetEnvironmentVariable("DOTNET_ROOT", dotnet_root);
 
 Console.WriteLine($"Extracted, launching: {tshock_path}");
+
 var proc = new Process();
+
+Console.CancelKeyPress += (sender, e) =>
+{
+	e.Cancel = !proc.HasExited;
+};
+
 proc.StartInfo = new()
 {
 	 FileName = tshock_path,