Add remote desktop start/stop commands and process with server support

Processes/RemoteDesktopProcess.cs

@@ -0,0 +1,58 @@
+using RemSox.Networking;
+using RemSox.Processing;
+using RemSox.UI.GUI.Rendering;
+using RemSox.UI.GUI.Windows;
+
+namespace RemSox.Processes;
+
+internal sealed class RemoteDesktopProcess() : Process("Remote Desktop Server")
+{
+    private TcpRpcServer? server;
+    private NetworkRenderSource? networkSource;
+    private CancellationTokenSource? cts;
+
+    public int Port { get; private set; }
+
+    internal override void Start(string[] args)
+    {
+        if (args.Length == 0 || !int.TryParse(args[0], out int port) || port <= 0 || port > 65535)
+        {
+            Logger.Log("Invalid port. Usage: rdp-start <port> (1-65535)", Logging.LogSeverity.Error);
+            RequestStop();
+            return;
+        }
+
+        Port = port;
+        cts = new CancellationTokenSource();
+        server = new TcpRpcServer();
+        networkSource = new NetworkRenderSource(server);
+
+        server.ListenTo<string>("SyncRequest", async _ =>
+        {
+            WindowManager.InvalidateAll();
+        });
+
+        _ = Task.Run(() => server.StartAsync(port, cts.Token));
+
+        WindowManager.AddRenderSource(networkSource);
+
+        Logger.Log($"Remote desktop server started on port {port}.", Logging.LogSeverity.Info);
+    }
+
+    internal override void Tick()
+    {
+    }
+
+    internal override void Stop()
+    {
+        cts?.Cancel();
+        server?.Stop();
+
+        if (networkSource is not null)
+        {
+            WindowManager.RemoveRenderSource(networkSource);
+        }
+
+        Logger.Log("Remote desktop server stopped.", Logging.LogSeverity.Info);
+    }
+}