feat: add initial styling and layout for portal views

- Created a global CSS file for consistent styling across the application.
- Implemented the Explore, Home, Topics, and various user views with responsive design.
- Added a Login view with OTP functionality and a Checkout view for order processing.
- Developed a NotFound view for handling 404 errors.
- Established a configuration file for Vite with Tailwind CSS integration.

frontend/portal/package.json

@@ -0,0 +1,27 @@
+{
+  "name": "portal",
+  "private": true,
+  "version": "0.0.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "vite build",
+    "preview": "vite preview"
+  },
+  "dependencies": {
+    "@primevue/themes": "^4.5.4",
+    "@tailwindcss/vite": "^4.1.18",
+    "pinia": "^3.0.4",
+    "primeicons": "^7.0.0",
+    "primevue": "^4.5.4",
+    "sass": "^1.97.1",
+    "tailwindcss": "^4.1.18",
+    "tailwindcss-animate": "^1.0.7",
+    "vue": "^3.5.24",
+    "vue-router": "^4.6.4"
+  },
+  "devDependencies": {
+    "@vitejs/plugin-vue": "^6.0.1",
+    "vite": "^7.2.4"
+  }
+}