ci: add fixed-version PKGBUILD for Arch Linux releases

this PKGBUILD intended for CI and GitHub release artifacts. targets tagged releases only and uses a fixed pkgver that matches the corresponding git tag. all of the VCS logic has been removed to PKGBUILD-git to ensure reproducible builds and stable versioning suitable for binary distribution.

the build process relies on electron-builder directory output (--dir) and packages only the unpacked application into a standard Arch Linux package (.pkg.tar.zst). other distro format are excluded from this path and handled separately.

this change establishes a clear separation between:
- rolling AUR development builds (-git)
- CI-generated, versioned Arch Linux release packages

the result is predictable artifact naming, correct version alignment, and Arch-compliant packaging for downstream users.

PKGBUILD

@@ -0,0 +1,27 @@
+# Maintainer: Fazri Gading <fazrigading@gmail.com>
+# This PKGBUILD is for Github Releases
+pkgname=Hytale-F2P
+pkgver=2.1.1
+pkgrel=1
+pkgdesc="Hytale-F2P - unofficial Hytale Launcher for free to play with multiplayer support"
+arch=('x86_64')
+url="https://github.com/amiayweb/Hytale-F2P"
+license=('custom')
+depends=('gtk3' 'nss' 'libxcrypt-compat')
+makedepends=('npm')
+source=("$url/archive/v$pkgver.tar.gz" "Hytale-F2P.desktop")
+sha256sums=('SKIP' '46488fada4775d9976d7b7b62f8d1f1f8d9a9a9d8f8aa9af4f2e2153019f6a30')
+
+build() {
+   cd "$_pkgname-$pkgver"
+   npm ci
+   npm run build:arch
+}
+
+package() {
+  cd "$_pkgname-$pkgver"
+  install -d "$pkgdir/opt/$_pkgname"
+  cp -r dist/linux-unpacked/* "$pkgdir/opt/$_pkgname"
+  install -Dm644 "$srcdir/$_pkgname.desktop" "$pkgdir/usr/share/applications/$_pkgname.desktop"
+  install -Dm644 GUI/icon.png "$pkgdir/usr/share/icons/hicolor/256x256/apps/$_pkgname.png"
+}