Enhance build workflow by forcing NuGet package restore and adding Microsoft.WindowsAppSDK package

Author: hoffe86

.github/workflows/build.yml

@@ -86,7 +86,8 @@ jobs:
       shell: pwsh
       run: |
             Write-Host "==== Restore Nuget packages ====" -ForegroundColor Green
-            dotnet restore ${{github.workspace}}\repo\OpenHAB.Windows.sln  
+            dotnet restore ${{github.workspace}}\repo\OpenHAB.Windows.sln --force --no-cache 
+            dotnet add ${{github.workspace}}\repo\OpenHAB.Windows.sln package Microsoft.WindowsAppSDK
 
     - name: Build OpenHab Windows App
       shell: pwsh