Add feature of changing theme into dark

[singhrohan62]

[sanku8383]

I'm excited to contribute to this open source repository and address the request to add a dark theme feature. Dark themes have become increasingly popular due to their benefits for reducing eye strain, conserving battery life, and providing a fresh aesthetic. I would like to propose a step-by-step approach to implementing this feature:

1. Identify Theme Support Dependencies
2. Introduce Theme Configuration
3. Implement Dark Theme Styling
4. Toggle Mechanism
5. User Preference Persistence
6. Apply Theme Dynamically

Looking forward to your thoughts and suggestions.