AUR publishing workflow (#6132)

Co-authored-by: aikido-pr-checks[bot] <169896070+aikido-pr-checks[bot]@users.noreply.github.com>

.github/aur/stirling-pdf-bin/PKGBUILD

@@ -0,0 +1,29 @@
+# Maintainer: Stirling PDF Inc <[email protected]>
+pkgname=stirling-pdf-bin
+pkgver=2.7.3
+pkgrel=1
+pkgdesc="Locally hosted, web-based PDF manipulation tool (desktop app, prebuilt binary)"
+arch=('x86_64')
+url="https://www.stirling.com"
+license=('MIT' 'LicenseRef-Stirling-PDF-Proprietary')
+depends=('gtk3' 'webkit2gtk' 'libappindicator-gtk3')
+provides=('stirling-pdf')
+conflicts=('stirling-pdf' 'stirling-pdf-git')
+options=('!strip')
+
+source_x86_64=("${pkgname}-${pkgver}.deb::https://github.com/Stirling-Tools/Stirling-PDF/releases/download/v${pkgver}/Stirling-PDF-linux-x86_64.deb")
+sha256sums_x86_64=('PLACEHOLDER_DEB_SHA256')
+
+package() {
+    # Extract the .deb archive
+    bsdtar -xf data.tar* -C "${pkgdir}"
+
+    # Fix permissions
+    find "${pkgdir}" -type d -exec chmod 755 {} \;
+
+    # Install license
+    install -Dm644 /dev/stdin "${pkgdir}/usr/share/licenses/${pkgname}/LICENSE" <<EOF
+Copyright (c) 2025 Stirling PDF Inc
+All rights reserved. See https://github.com/Stirling-Tools/Stirling-PDF/blob/main/LICENSE
+EOF
+}