feat: Initialize frontend with React, Vite, and Tailwind CSS

- Set up main entry point for React application.
- Create About, Home, NotFound, Privacy, and Terms pages with SEO support.
- Implement API service for file uploads and task management.
- Add global styles using Tailwind CSS.
- Create utility functions for SEO and text processing.
- Configure Vite for development and production builds.
- Set up Nginx configuration for serving frontend and backend.
- Add scripts for cleanup of expired files and sitemap generation.
- Implement deployment script for production environment.

frontend/package.json

@@ -0,0 +1,38 @@
+{
+  "name": "saas-pdf-frontend",
+  "private": true,
+  "version": "1.0.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "tsc --noEmit && vite build",
+    "preview": "vite preview",
+    "lint": "eslint ."
+  },
+  "dependencies": {
+    "axios": "^1.7.0",
+    "i18next": "^23.11.0",
+    "i18next-browser-languagedetector": "^8.0.0",
+    "lucide-react": "^0.400.0",
+    "react": "^18.3.0",
+    "react-dom": "^18.3.0",
+    "react-dropzone": "^14.2.0",
+    "react-ga4": "^2.1.0",
+    "react-helmet-async": "^2.0.0",
+    "react-i18next": "^14.1.0",
+    "react-router-dom": "^6.23.0",
+    "sonner": "^1.5.0",
+    "zustand": "^4.5.0"
+  },
+  "devDependencies": {
+    "@types/node": "^20.14.0",
+    "@types/react": "^18.3.0",
+    "@types/react-dom": "^18.3.0",
+    "@vitejs/plugin-react": "^4.3.0",
+    "autoprefixer": "^10.4.0",
+    "postcss": "^8.4.0",
+    "tailwindcss": "^3.4.0",
+    "typescript": "^5.5.0",
+    "vite": "^5.4.0"
+  }
+}