feat: TextBox default ContextMenu.

src/Semi.Avalonia/Controls/SelectableTextBlock.axaml

@@ -7,7 +7,7 @@
         <MenuItem
             x:Name="SelectableTextBlockContextFlyoutCopyItem"
             Command="{Binding $parent[SelectableTextBlock].Copy}"
-            Header="Copy"
+            Header="{DynamicResource STRING_MENU_COPY}"
             InputGesture="{x:Static TextBox.CopyGesture}"
             IsEnabled="{Binding $parent[SelectableTextBlock].CanCopy}" />
     </MenuFlyout>

src/Semi.Avalonia/Controls/TextBox.axaml

@@ -6,19 +6,19 @@
         <MenuItem
             x:Name="TextBoxContextFlyoutCutItem"
             Command="{Binding $parent[TextBox].Cut}"
-            Header="Cut"
+            Header="{DynamicResource STRING_MENU_CUT}"
             InputGesture="{x:Static TextBox.CutGesture}"
             IsEnabled="{Binding $parent[TextBox].CanCut}" />
         <MenuItem
             x:Name="TextBoxContextFlyoutCopyItem"
             Command="{Binding $parent[TextBox].Copy}"
-            Header="Copy"
+            Header="{DynamicResource STRING_MENU_COPY}"
             InputGesture="{x:Static TextBox.CopyGesture}"
             IsEnabled="{Binding $parent[TextBox].CanCopy}" />
         <MenuItem
             x:Name="TextBoxContextFlyoutPasteItem"
             Command="{Binding $parent[TextBox].Paste}"
-            Header="Paste"
+            Header="{DynamicResource STRING_MENU_PASTE}"
             InputGesture="{x:Static TextBox.PasteGesture}"
             IsEnabled="{Binding $parent[TextBox].CanPaste}" />
     </MenuFlyout>

src/Semi.Avalonia/Locale/en-us.axaml

@@ -4,4 +4,7 @@
     <x:String x:Key="STRING_CHOOSER_SHOW_HIDDEN_FILES">Show hidden flies</x:String>
     <x:String x:Key="STRING_CHOOSER_DIALOG_OK">OK</x:String>
     <x:String x:Key="STRING_CHOOSER_DIALOG_CANCEL">Cancel</x:String>
+    <x:String x:Key="STRING_MENU_CUT">Cut</x:String>
+    <x:String x:Key="STRING_MENU_COPY">Copy</x:String>
+    <x:String x:Key="STRING_MENU_PASTE">Paste</x:String>
 </ResourceDictionary>

src/Semi.Avalonia/Locale/zh-cn.axaml

@@ -4,4 +4,7 @@
     <x:String x:Key="STRING_CHOOSER_SHOW_HIDDEN_FILES">显示隐藏文件</x:String>
     <x:String x:Key="STRING_CHOOSER_DIALOG_OK">确认</x:String>
     <x:String x:Key="STRING_CHOOSER_DIALOG_CANCEL">取消</x:String>
+    <x:String x:Key="STRING_MENU_CUT">剪切</x:String>
+    <x:String x:Key="STRING_MENU_COPY">复制</x:String>
+    <x:String x:Key="STRING_MENU_PASTE">粘贴</x:String>
 </ResourceDictionary>