MSIX: add debug configuration option for package building (#1561)

installer/MSIX/build_msix.ps1

@@ -1 +1,13 @@
-makeappx build /v /overwrite /f PackagingLayout.xml /id "PowerToys-x64" /op bin\
+param (
+  [bool]$debug = 0
+)
+
+$PackagingLayoutFile = "PackagingLayout.xml"
+
+if ($debug) {
+  (Get-Content $PackagingLayoutFile) `
+  -replace 'x64\\Release\\', 'x64\Debug\' `
+  |  Out-File -Encoding utf8 "$env:temp\$PackagingLayoutFile"
+  $PackagingLayoutFile = "$env:temp\$PackagingLayoutFile"
+}
+makeappx build /v /overwrite /f $PackagingLayoutFile /id "PowerToys-x64" /op bin\