Add CLI process and GUI start/stop commands with process management

UI/CLI/Commands/StartGuiCommand.cs

@@ -11,6 +11,18 @@ public class StartGuiCommand : ICommand
     public void Execute(string? arguments, Action<string> printLine)
     {
         printLine("Starting Desktop Process...");
+
+        if (ProcessManager.IsProcessRunning<DesktopProcess>())
+        {
+            printLine("Desktop Process is already running.");
+            return;
+        }
+
+        foreach (Process process in ProcessManager.GetProcessesOfType<CliProcess>())
+        {
+            ProcessManager.StopProcess(process.Id);
+        }
+
         _ = ProcessManager.SpawnProcess<DesktopProcess>();
     }
 }

UI/CLI/Commands/StopGuiCommand.cs

@@ -0,0 +1,31 @@
+using Cosmos.Kernel.System.Graphics;
+using Org.BouncyCastle.Bcpg;
+using RemSox.Processes;
+using RemSox.Processing;
+using RemSox.UI.GUI.Windows;
+
+namespace RemSox.UI.CLI.Commands;
+
+public class StopGuiCommand : ICommand
+{
+    public string Name => "stop-gui";
+    public string Description => "Stops the Graphical User Interface (Desktop Process)";
+
+    public async void Execute(string? arguments, Action<string> printLine)
+    {
+        printLine("Stopping Desktop Process...");
+
+        if (!ProcessManager.IsProcessRunning<DesktopProcess>())
+        {
+            printLine("Desktop Process is not running.");
+            return;
+        }
+
+        foreach (Process process in ProcessManager.GetProcessesOfType<DesktopProcess>())
+        {
+            await ProcessManager.StopProcessAndWaitAsync(process.Id);
+        }
+
+        _ = ProcessManager.SpawnProcess<CliProcess>();
+    }
+}