fix(deps): Add @unocss/astro to storefront dependencies

Author: leomp12

packages/storefront/package.json

@@ -63,6 +63,7 @@
     "mrmime": "^2.0.1",
     "semver": "^7.7.4",
     "sharp": "^0.33.3",
+    "@unocss/astro": "^66.6.6",
     "unocss": "^66.6.6",
     "unplugin-auto-import": "^19.3.0",
     "vue": "^3.5.30",