feat: Enhance dashboard with stats cards and task filtering

- Added stats cards to display active, completed, overdue, and due-today tasks on the dashboard.
- Implemented search functionality to filter tasks in real-time based on user input.
- Introduced quick-pick date buttons for easier task date selection.
- Updated task rendering logic to handle empty states for task lists.
- Improved overall user interface with new CSS styles for stat cards and buttons.

chore: Update environment variables and backend error handling

- Fixed formatting in the .env file for consistency.
- Enhanced error handling in the backend API for better debugging.

feat: Revamp frontend pages with new features and pricing sections

- Redesigned the index.html page to include a hero section and feature highlights.
- Created a new features page with dynamic loading of features from JSON.
- Implemented a pricing page that loads plans from JSON and highlights the featured plan.
- Added support and FAQ sections with dynamic content loading and contact form functionality.
- Introduced JSON files for FAQs, features, and pricing to allow easy updates without code changes.

frontend/data/faq.json

@@ -0,0 +1,28 @@
+{
+  "faqs": [
+    {
+      "question": "Is BucketLisk free to use?",
+      "answer": "Yes, the Free plan lets you create up to 25 tasks across 1 list, forever. Upgrade to Pro or Team for unlimited lists, reminders and shared team features."
+    },
+    {
+      "question": "Where is my data stored?",
+      "answer": "Tasks are stored in a MongoDB database. Your data is only accessible via authenticated API requests, and all traffic is sent over HTTPS."
+    },
+    {
+      "question": "Can I access my tasks on mobile?",
+      "answer": "The web app is fully responsive and works on phones, tablets and desktops. A native mobile app is on the roadmap."
+    },
+    {
+      "question": "How do I reset my password?",
+      "answer": "Click the 'Forgot Password?' link on the login page and follow the instructions sent to your email."
+    },
+    {
+      "question": "Can I export my data?",
+      "answer": "Yes. From your dashboard settings you can export all your tasks as a JSON file at any time."
+    },
+    {
+      "question": "Do you support team collaboration?",
+      "answer": "Team plans include shared lists, role-based permissions, and integrations with Slack, Salesforce and Asana."
+    }
+  ]
+}