Replace halt command with shutdown and add new reboot command

Kernel.cs

@@ -19,7 +19,8 @@ public class Kernel : Sys.Kernel
         CommandManager.RegisterCommands([
             new HelpCommand(),
             new ClearCommand(),
-            new HaltCommand(),
+            new ShutdownCommand(),
+            new RebootCommand(),
             new SpawnProcessCommand(),
             new ListProcessesCommand(),
             new StopProcessCommand(),

UI/CLI/Commands/HaltCommand.cs

@@ -1,14 +1,14 @@
 namespace RemSox.UI.CLI.Commands;
 
-public sealed class HaltCommand : ICommand
+public sealed class ShutdownCommand : ICommand
 {
-    public string Name => "halt";
+    public string Name => "shutdown";
 
-    public string Description => "Halt the system";
+    public string Description => "Shutdown the system";
 
     public void Execute(string? arguments, Action<string> printLine)
     {
-        printLine("Halting system...");
+        printLine("Shutting down system...");
-        Environment.Exit(0);
+        Sys.Power.Shutdown();
     }
 }

UI/CLI/Commands/RebootCommand.cs

@@ -0,0 +1,14 @@
+namespace RemSox.UI.CLI.Commands;
+
+public class RebootCommand : ICommand
+{
+    public string Name => "reboot";
+
+    public string Description => "Reboot the system";
+
+    public void Execute(string? arguments, Action<string> printLine)
+    {
+        printLine("Rebooting system...");
+        Sys.Power.Reboot();
+    }
+}