feat: initialize control.

src/Ursa.Themes.Semi/Controls/KeyGestureInput.axaml

@@ -0,0 +1,26 @@
+<ResourceDictionary
+    xmlns="https://github.com/avaloniaui"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:converters="using:Avalonia.Controls.Converters"
+    xmlns:u="https://irihi.tech/ursa">
+    <!--  Add Resources Here  -->
+    <converters:PlatformKeyGestureConverter x:Key="KeyGestureConverter" />
+
+    <ControlTheme x:Key="{x:Type u:KeyGestureInput}" TargetType="u:KeyGestureInput">
+        <Setter Property="Template">
+            <ControlTemplate TargetType="u:KeyGestureInput">
+                <Border
+                    Name="Background"
+                    Width="100"
+                    MinHeight="32"
+                    Background="LightBlue"
+                    BorderThickness="1">
+                    <TextBlock Text="{TemplateBinding Gesture, Converter={StaticResource KeyGestureConverter}}" />
+                </Border>
+            </ControlTemplate>
+        </Setter>
+        <Style Selector="^:focus-within /template/ Border#Background">
+            <Setter Property="BorderBrush" Value="Blue" />
+        </Style>
+    </ControlTheme>
+</ResourceDictionary>