ci: add MSIX logo asset generator and generated assets

scripts/msix/generate_assets.ps1

@@ -0,0 +1,31 @@
+# Generates the MSIX package logo assets from the 192px master logo.
+# Run once on Windows (re-run if the logo changes), then commit the PNGs in assets/.
+# Scale-200 variants would need a >192px master; regenerate from OrcaSlicer.svg if ever needed.
+$ErrorActionPreference = 'Stop'
+Add-Type -AssemblyName System.Drawing
+
+$repoRoot = Split-Path (Split-Path $PSScriptRoot -Parent) -Parent
+$source   = Join-Path $repoRoot 'resources\images\OrcaSlicer_192px.png'
+$outDir   = Join-Path $PSScriptRoot 'assets'
+New-Item -ItemType Directory -Force $outDir | Out-Null
+
+$sizes = @{
+    'Square150x150Logo.png'                              = 150
+    'Square44x44Logo.png'                                = 44
+    'Square44x44Logo.targetsize-44_altform-unplated.png' = 44
+    'StoreLogo.png'                                      = 50
+}
+
+$src = [System.Drawing.Image]::FromFile($source)
+foreach ($name in $sizes.Keys) {
+    $px  = $sizes[$name]
+    $bmp = New-Object System.Drawing.Bitmap($px, $px)
+    $gfx = [System.Drawing.Graphics]::FromImage($bmp)
+    $gfx.InterpolationMode = [System.Drawing.Drawing2D.InterpolationMode]::HighQualityBicubic
+    $gfx.DrawImage($src, 0, 0, $px, $px)
+    $gfx.Dispose()
+    $bmp.Save((Join-Path $outDir $name), [System.Drawing.Imaging.ImageFormat]::Png)
+    $bmp.Dispose()
+    Write-Output "Wrote $name (${px}x${px})"
+}
+$src.Dispose()