feat: extract shop from mp/shop — initial libreshop/shop

Source moved verbatim from mp/shop/ on 2026-04-29; mp was the first
concrete adapter consuming the libreshop toolkit. Builds and publishes
git.librete.ch/libreshop/shop on every main / v* push via the standard
.gitea/workflows/build.yml shared across libreshop components.

package.json

@@ -0,0 +1,34 @@
+{
+  "name": "shop",
+  "type": "module",
+  "private": true,
+  "scripts": {
+    "build": "nuxt build",
+    "dev": "nuxt dev",
+    "generate": "nuxt generate",
+    "preview": "nuxt preview",
+    "postinstall": "nuxt prepare"
+  },
+  "dependencies": {
+    "@headlessui/vue": "^1.7.23",
+    "@nuxt/image": "^2.0.0",
+    "@nuxtjs/sitemap": "^7.4.7",
+    "@nuxtjs/tailwindcss": "^6.14.0",
+    "@paypal/paypal-js": "^9.0.1",
+    "@pinia/nuxt": "^0.11.3",
+    "debug": "^4.4.3",
+    "marked": "^17.0.1",
+    "nuxt": "^4.2.1",
+    "vue": "^3.5.25",
+    "vue-confetti-explosion": "^1.0.2",
+    "vue-markdown-render": "^2.3.0",
+    "vue-router": "^4.6.3",
+    "vue-strapi-blocks-renderer": "^0.2.2",
+    "vue3-carousel": "^0.17.0"
+  },
+  "devDependencies": {
+    "@tailwindcss/forms": "^0.5.10",
+    "@types/debug": "^4.1.12",
+    "typescript": "^5.9.3"
+  }
+}