[GUI] split shared theme into resource dictionaries (#669)

src/SharpEmu.GUI/Themes/Templates/SettingRow.axaml

@@ -0,0 +1,34 @@
+<!--
+Copyright (C) 2026 SharpEmu Emulator Project
+SPDX-License-Identifier: GPL-2.0-or-later
+Control theme for the shared launcher settings row.
+-->
+
+<ResourceDictionary xmlns="https://github.com/avaloniaui"
+                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+                    xmlns:local="clr-namespace:SharpEmu.GUI">
+  <ControlTheme x:Key="{x:Type local:SettingRow}" TargetType="local:SettingRow">
+    <Setter Property="Template">
+      <ControlTemplate>
+        <Grid ColumnDefinitions="*,Auto">
+          <StackPanel VerticalAlignment="Center" Spacing="2" Margin="0,0,16,0">
+            <TextBlock x:Name="PART_Label" Text="{TemplateBinding Label}" FontSize="13" />
+            <TextBlock Text="{TemplateBinding Description}" FontSize="11"
+                       Foreground="{StaticResource MutedBrush}" TextWrapping="Wrap"
+                       IsVisible="{Binding Description, RelativeSource={RelativeSource TemplatedParent},
+                                   Converter={x:Static StringConverters.IsNotNullOrEmpty}}" />
+          </StackPanel>
+          <StackPanel Grid.Column="1" Orientation="Horizontal" Spacing="10" VerticalAlignment="Center">
+            <ToggleSwitch OnContent="Override" OffContent="Override" MinWidth="0"
+                          VerticalAlignment="Center"
+                          IsVisible="{TemplateBinding ShowOverride}"
+                          IsChecked="{Binding IsOverridden, RelativeSource={RelativeSource TemplatedParent}, Mode=TwoWay}" />
+            <ContentPresenter x:Name="PART_Slot"
+                              Content="{TemplateBinding Content}"
+                              VerticalAlignment="Center" />
+          </StackPanel>
+        </Grid>
+      </ControlTemplate>
+    </Setter>
+  </ControlTheme>
+</ResourceDictionary>