added logo and changed favicon.

[sweta-singh28]

Related Issue

added logo and changed favicon.

#issue no. #409

Description

Updated the logo and changed the favicon to enhance the project's appearance, giving it a more modern and cohesive visual identity. These changes aim to create a more polished look and improve user recognition and experience.

Type of PR

• [ ] Bug fix
• [x] Feature enhancement
• [ ] Documentation update
• [ ] Other (specify): _______________

Screenshots / videos (if applicable)

Checklist:

• [x] I have performed a self-review of my code
• [x] I have read and followed the Contribution Guidelines.
• [x] I have tested the changes thoroughly before submitting this pull request.
• [x] I have provided relevant issue numbers, screenshots, and videos after making the changes.
• [x] I have commented my code, particularly in hard-to-understand areas.

Additional context:

[Include any additional information or context that might be helpful for reviewers.]