Added UI support for LINUX KDE Plasma

PluginManager/UX/UxHandler.cs

@@ -0,0 +1,42 @@
+using System.Threading.Tasks;
+
+namespace PluginManager.UX;
+
+public static class UxHandler 
+{
+    private static IOutputModel _model;
+    
+    public static void Init()
+    {
+        if (Config.AppSettings["UI"] == "KDE")
+            _model = new Linux.KDE();
+        else
+            _model = new Other.Console();
+    }
+    
+    public static async Task ShowMessageBox(string title, string message, MessageBoxType type = MessageBoxType.Info)
+    {
+        await _model.ShowMessageBox(title, message, type);
+    }
+    
+    public static async Task<string> ShowInputBox(string title, string message)
+    {
+        return await _model.ShowInputBox(title, message);
+    }
+    
+    public static async Task ShowMessageBox(string message)
+    {
+        await _model.ShowMessageBox(message);
+    }
+    
+    public static async Task<int> ShowMessageBox(string title, string message, MessageBoxButtons buttons, bool isWarning)
+    {
+        return await _model.ShowMessageBox(title, message, buttons, isWarning);
+    }
+    
+    public static async Task ShowNotification(string title, string message, int timeout_seconds = 5)
+    {
+        await _model.ShowNotification(title, message, timeout_seconds);
+    }
+    
+}