feat(moonarch-git): add moonup symlink for moonarch-update

moonarch-git/PKGBUILD

@@ -141,8 +141,9 @@ package() {
     # --- Helper scripts -> /usr/bin/ ---
     install -Dm755 defaults/bin/moonarch-* -t "$pkgdir/usr/bin/"
 
-    # moonarch-update
+    # moonarch-update + shorthand alias
     install -Dm755 scripts/moonarch-update "$pkgdir/usr/bin/moonarch-update"
+    ln -s moonarch-update "$pkgdir/usr/bin/moonup"
 
     # awww compatibility symlinks (waypaper calls swww)
     ln -sf /usr/bin/awww "$pkgdir/usr/bin/swww"