Add project files.

Views/Pages/SettingsPage.xaml.cs

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+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT was not distributed with this file, You can obtain one at https://opensource.org/licenses/MIT.
+// Copyright (C) Leszek Pomianowski and WPF UI Contributors.
+// All Rights Reserved.
+
+using DownloadManager.ViewModels.Pages;
+using Wpf.Ui.Controls;
+
+namespace DownloadManager.Views.Pages;
+public partial class SettingsPage : INavigableView<SettingsViewModel>
+{
+    public SettingsViewModel ViewModel
+    {
+        get;
+    }
+
+    public SettingsPage(SettingsViewModel viewModel)
+    {
+        ViewModel = viewModel;
+        DataContext = this;
+
+        InitializeComponent();
+    }
+}