feat: 支持状态栏显示进度条

src/MaaWpfGui/ViewModels/UI/RootViewModel.cs

@@ -90,6 +90,19 @@ namespace MaaWpfGui.ViewModels.UI
             set => SetAndNotify(ref _windowTitle, value);
         }
 
+        private double _progress;
+
+        /// <summary>
+        /// Gets or sets the progress.
+        /// 0.0 to 1.0.
+        /// 置 0 以隐藏进度条.
+        /// </summary>
+        public double Progress
+        {
+            get => _progress;
+            set => SetAndNotify(ref _progress, value);
+        }
+
         private bool _windowTitleScrollable = Convert.ToBoolean(ConfigurationHelper.GetValue(ConfigurationKeys.WindowTitleScrollable, bool.FalseString));
 
         /// <summary>

src/MaaWpfGui/Views/UI/RootView.xaml

@@ -51,6 +51,9 @@
                 Foreground="{Binding WindowTopMostButtonForeground}" />
         </Grid>
     </hc:Window.NonClientAreaContent>
+    <Window.TaskbarItemInfo>
+        <TaskbarItemInfo ProgressState="Normal" ProgressValue="{Binding Progress}" />
+    </Window.TaskbarItemInfo>
     <DockPanel>
         <local:NotifyIcon x:Name="NotifyIcon" Visibility="Hidden" />
         <TabControl