Adding new window for adding password stores

App/UI/AddShortcutWindow/AddShortcutWindow.cs

@@ -0,0 +1,41 @@
+using Adw;
+
+namespace Keychain.UI;
+
+public class AddShortcutWindow
+{
+    public Window Window { get; }
+    private EntryRow? pathEntry;
+    private Gtk.Button? browseButton;
+
+    public AddShortcutWindow()
+    {
+        var builder = new Gtk.Builder("Keychain.UI.AddShortcutWindow.AddShortcutWindow.xml");
+
+        var window = builder.GetObject("add_shortcut_window") as Window;
+        if (window == null)
+        {
+            throw new Exception("Failed to load embedded resource AddShortcutWindow.xml");
+        }
+        Window = window;
+
+        browseButton = builder.GetObject("folder_browse_button") as Gtk.Button;
+        if (browseButton == null)
+        {
+            throw new Exception("Failed to load UI element with ID: folder_browse_button");
+        }
+        browseButton.OnClicked += BrowseFolder;
+    }
+
+    private async void BrowseFolder(object sender, EventArgs e)
+    {
+        var fileDialog = new Gtk.FileDialog();  
+        var selectedFolder = await fileDialog.SelectFolderAsync(Window);
+
+        if (selectedFolder != null)
+        {
+            var buttonContent = (ButtonContent)browseButton.Child;
+            buttonContent.Label = selectedFolder.GetPath();
+        }
+    }
+}