Added the dark theme and logo was added to the extension

[haseeb-555]

Description The current UI may be uncomfortable for users in low-light environments, potentially leading to eye strain. Implementing a Dark Mode option can enhance user experience by providing a softer, more comfortable interface for users in low-light settings or at night.

Why is this feature important to you? It’s essential for accessibility and comfort, allowing users to use the application without causing eye strain in dim environments.

Describe the solution you'd like Introduce a Dark Mode feature that users can toggle on and off via a switch. The feature should include:

• Light Mode: For daytime or well-lit environments.
• Dark Mode: For low-light conditions or nighttime.
• Automatic Mode: Adjusts based on system settings (if possible).

Current Progress

• The Dark Theme has been implemented, providing an eye-friendly interface with reduced brightness and softer color schemes.
• The logo of the extension has been added, ensuring proper branding.

[Nandika-A]

Hi @haseeb-555! This repository is accepting contributions only via contrihub's organisation. I appreciate your work, but someone else was already assigned this issue before in contrihub, so I can't accept the PR here.