Refactor process spawning command and move TestProcess to its own file

Kernel.cs

@@ -24,7 +24,7 @@ public class Kernel : Sys.Kernel
             new HelpCommand(),
             new ClearCommand(),
             new HaltCommand(),
-            new SpawnTestProcessCommand(),
+            new SpawnProcessCommand(),
             new ListProcessesCommand(),
             new StopProcessCommand(),
             new StartGuiCommand(),
@@ -62,44 +62,6 @@ public class Kernel : Sys.Kernel
     }
 }
 
-public class TestProcess() : Process("Test Process")
-{
-    internal override void Start(string[] args)
-    {
-        Window window = WindowManager.CreateWindow(this, "Test Window", Point.Empty, new Size(200, 150));
-        window.AutoFlush = true;
-
-        Circle circle = window.CreateUIElement<UI.GUI.UIEelements.Shapes.Circle>(rect =>
-        {
-            rect.Position = new Point(10, 10);
-            rect.Radius = 50;
-            rect.Color = Color.Red;
-        });
-
-        circle.Radius = 40;
-
-        SendMessageToAllProcesses(new TestMessage { SenderProcessId = Id });
-    }
-
-    internal override void Tick()
-    {
-        // Example tick logic - could be used for animations, timed events, etc.
-    }
-
-    internal override void HandleInterProcessMessage(Message message)
-    {
-        if (message is TestMessage testMessage && message.SenderProcessId != Id)
-        {
-            Console.WriteLine($"Received message in {Name} (ID: {Id}): {testMessage.MessageText}");
-        }
-    }
-}
-
-internal class TestMessage : Message
-{
-    public string MessageText { get; set; } = "Hello from TestMessage!";
-}
-
 public static unsafe partial class StartupCodeHelpers
 {
     [RuntimeExport("fmod")]