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/features.json

@@ -0,0 +1,34 @@
+{
+  "features": [
+    {
+      "icon": "./images/CreateNew.png",
+      "title": "Create tasks in seconds",
+      "description": "Add a title, description and due date. Your task is saved and sorted instantly."
+    },
+    {
+      "icon": "./images/Tick.svg",
+      "title": "Mark as done (or undo)",
+      "description": "One click to complete a task, one click to move it back if you change your mind."
+    },
+    {
+      "icon": "./images/Tasks-Screenshot (1).png",
+      "title": "Two-column layout",
+      "description": "Your active tasks and completed tasks live side-by-side, so you always know what's left."
+    },
+    {
+      "icon": "./images/Email.svg",
+      "title": "Flexible sorting",
+      "description": "Sort by due date, created date, or default order. Indexed on the backend for speed."
+    },
+    {
+      "icon": "./images/Cross.svg",
+      "title": "Edit or delete anytime",
+      "description": "Made a mistake? Update any field or remove the task entirely with a single click."
+    },
+    {
+      "icon": "./images/Slack.png",
+      "title": "Integrations (coming soon)",
+      "description": "Slack, Salesforce and Asana integrations are in the works for the Team plan."
+    }
+  ]
+}