Restore self-contained Windows App SDK packaging

The shared-target-framework refactor moved the Windows App SDK self-contained settings into Directory.Build.props behind a condition that depends on TargetFramework being set. Because Directory.Build.props is evaluated before UniGetUI.csproj assigns TargetFramework, the app project stopped evaluating as self-contained and no longer bundled Microsoft.WindowsAppRuntime.dll in release artifacts.

Move the self-contained Windows App SDK settings into UniGetUI.csproj so they are evaluated after the app TargetFramework is known and the runtime payload is bundled again.

Fixes #4487.

Author: mamoreau-devolutions

src/Directory.Build.props

@@ -36,12 +36,6 @@
     <PropertyGroup Condition="$([System.String]::Copy('$(TargetFramework)').Contains('-windows'))">
         <TargetPlatformMinVersion>10.0.19041.0</TargetPlatformMinVersion>
         <WindowsSdkPackageVersion>10.0.26100.56</WindowsSdkPackageVersion>
-        <WindowsAppSDKSelfContained>true</WindowsAppSDKSelfContained>
-        <RuntimeIdentifiers>win-x64;win-arm64</RuntimeIdentifiers>
-        <RuntimeIdentifier
-            Condition="'$(Platform)' != '' and '$(Platform)' != 'AnyCPU' and '$(Platform)' != 'Any CPU'"
-            >win-$(Platform)</RuntimeIdentifier
-        >
     </PropertyGroup>
 
     <PropertyGroup>

src/UniGetUI/UniGetUI.csproj

@@ -14,6 +14,12 @@
         <!-- .NET & AppSdk publish options -->
         <WindowsAppSDKWinUI>true</WindowsAppSDKWinUI>
         <WindowsPackageType>None</WindowsPackageType>
+        <WindowsAppSDKSelfContained>true</WindowsAppSDKSelfContained>
+        <RuntimeIdentifiers>win-x64;win-arm64</RuntimeIdentifiers>
+        <RuntimeIdentifier
+            Condition="'$(Platform)' != '' and '$(Platform)' != 'AnyCPU' and '$(Platform)' != 'Any CPU'"
+            >win-$(Platform)</RuntimeIdentifier
+        >
 
         <!--PublishAot>true</PublishAot-->
         <PublishTrimmed>true</PublishTrimmed>