feat: 增加钻带涨缩功能，支持倍率/PPM模式缩放坐标

- 新增 ExcellonScaler 引擎：普通孔缩放坐标，G85槽孔保护槽长，刀具定义行原样保留
- 新增 DrillScalingWindow 参数设置窗口：倍率/PPM模式切换，X/Y独立输入
- 集成到启动功能菜单：.dr2/.dpin 文件显示"涨缩"按钮
- 输出覆盖原文件 + .bak 备份，GB2312 编码

DrillScalingWindow.xaml

@@ -0,0 +1,94 @@
+<Window x:Class="DrillTools.DrillScalingWindow"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        Title="钻带涨缩"
+        Width="350"
+        SizeToContent="Height"
+        ResizeMode="NoResize"
+        Topmost="True"
+        WindowStartupLocation="CenterScreen">
+    <Grid Margin="15">
+        <Grid.RowDefinitions>
+            <RowDefinition Height="Auto" />
+            <RowDefinition Height="Auto" />
+            <RowDefinition Height="Auto" />
+            <RowDefinition Height="Auto" />
+            <RowDefinition Height="Auto" />
+        </Grid.RowDefinitions>
+
+        <!-- 模式选择 -->
+        <GroupBox Grid.Row="0" Header="输入模式" Margin="0,0,0,10">
+            <StackPanel>
+                <RadioButton Name="RatioRadioButton"
+                             Content="倍率模式"
+                             IsChecked="True"
+                             Margin="0,5,0,5"
+                             Checked="ModeRadioButton_Changed" />
+                <RadioButton Name="PpmRadioButton"
+                             Content="PPM 模式"
+                             Margin="0,0,0,5"
+                             Checked="ModeRadioButton_Changed" />
+                <TextBlock Text="{Binding ModeDescription}"
+                           Foreground="Gray"
+                           FontSize="11"
+                           Margin="20,0,0,5" />
+            </StackPanel>
+        </GroupBox>
+
+        <!-- X 方向参数 -->
+        <Grid Grid.Row="1" Margin="0,0,0,8">
+            <Grid.ColumnDefinitions>
+                <ColumnDefinition Width="Auto" />
+                <ColumnDefinition Width="*" />
+            </Grid.ColumnDefinitions>
+            <TextBlock Grid.Column="0"
+                       Text="{Binding ModeLabelX}"
+                       VerticalAlignment="Center"
+                       Margin="0,0,10,0" />
+            <TextBox Grid.Column="1"
+                     Text="{Binding InputX, UpdateSourceTrigger=PropertyChanged}"
+                     Height="25" />
+        </Grid>
+
+        <!-- Y 方向参数 -->
+        <Grid Grid.Row="2" Margin="0,0,0,8">
+            <Grid.ColumnDefinitions>
+                <ColumnDefinition Width="Auto" />
+                <ColumnDefinition Width="*" />
+            </Grid.ColumnDefinitions>
+            <TextBlock Grid.Column="0"
+                       Text="{Binding ModeLabelY}"
+                       VerticalAlignment="Center"
+                       Margin="0,0,10,0" />
+            <TextBox Grid.Column="1"
+                     Text="{Binding InputY, UpdateSourceTrigger=PropertyChanged}"
+                     Height="25" />
+        </Grid>
+
+        <!-- 提示信息 -->
+        <TextBlock Grid.Row="3"
+                   Name="ErrorText"
+                   Foreground="Red"
+                   FontSize="11"
+                   Text=""
+                   Margin="0,0,0,10"
+                   Visibility="Collapsed" />
+
+        <!-- 按钮区域 -->
+        <StackPanel Grid.Row="4"
+                    HorizontalAlignment="Right"
+                    Orientation="Horizontal">
+            <Button Width="80"
+                    Height="30"
+                    Content="取消"
+                    IsCancel="True"
+                    Margin="0,0,10,0"
+                    Click="CancelButton_Click" />
+            <Button Width="80"
+                    Height="30"
+                    Content="执行"
+                    IsDefault="True"
+                    Click="ExecuteButton_Click" />
+        </StackPanel>
+    </Grid>
+</Window>