Updated the WebUI by creating new page for viewing the installed plugins

WebUI/Models/InstalledPluginViewModel.cs

@@ -0,0 +1,8 @@
+namespace WebUI.Models;
+
+public class InstalledPluginViewModel
+{
+    public string Name { get; set; }
+    public string Version { get; set; }
+    public bool IsOfflineAdded { get; set; }
+}