feat: add InnerContent to AutoCompleteBox and NumericUpDown.

demo/Directory.Build.props

@@ -1,6 +1,6 @@
 <Project>
   <PropertyGroup>
     <Nullable>enable</Nullable>
-    <AvaloniaVersion>11.0.7</AvaloniaVersion>
+    <AvaloniaVersion>11.1.999-cibuild0045273-beta</AvaloniaVersion>
   </PropertyGroup>
 </Project>

demo/Semi.Avalonia.Demo/Pages/AutoCompleteBoxDemo.axaml

@@ -70,5 +70,16 @@
                 </DataTemplate>
             </AutoCompleteBox.ItemTemplate>
         </AutoCompleteBox>
+        <AutoCompleteBox 
+            InnerLeftContent="https://"
+            InnerRightContent=".com"
+            ItemsSource="{Binding States}"
+            ValueMemberBinding="{ReflectionBinding Name}">
+            <AutoCompleteBox.ItemTemplate>
+                <DataTemplate DataType="local:StateData">
+                    <TextBlock Text="{Binding Name}" />
+                </DataTemplate>
+            </AutoCompleteBox.ItemTemplate>
+        </AutoCompleteBox>
     </StackPanel>
 </UserControl>

demo/Semi.Avalonia.Demo/Pages/NumericUpDownDemo.axaml

@@ -37,5 +37,11 @@
             Classes="Small"
             Maximum="100"
             Minimum="0" />
+        <NumericUpDown
+            Width="200"
+            InnerLeftContent="Price"
+            InnerRightContent="$"
+            Maximum="100"
+            Minimum="0" />
     </StackPanel>
 </UserControl>