refactor: move spa to frontend folder

frontend/spa/package.json

@@ -0,0 +1,34 @@
+{
+  "name": "tg-mini-app-shop",
+  "private": true,
+  "version": "0.0.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite --host",
+    "build": "vite build",
+    "preview": "vite preview"
+  },
+  "dependencies": {
+    "@heroicons/vue": "^2.2.0",
+    "@tailwindcss/vite": "^4.1.16",
+    "@vueuse/core": "^13.9.0",
+    "crypto-js": "^4.2.0",
+    "js-md5": "^0.8.3",
+    "ofetch": "^1.4.1",
+    "pinia": "^3.0.3",
+    "swiper": "^11.2.10",
+    "vue": "^3.5.22",
+    "vue-imask": "^7.6.1",
+    "vue-router": "^4.6.3",
+    "vue-tg": "^0.9.0"
+  },
+  "devDependencies": {
+    "@vitejs/plugin-vue": "^6.0.1",
+    "autoprefixer": "^10.4.21",
+    "daisyui": "^5.3.10",
+    "postcss": "^8.5.6",
+    "tailwindcss": "^4.1.16",
+    "terser": "^5.44.0",
+    "vite": "^7.1.12"
+  }
+}