enhance: Navbar enhancement

[BamaCharanChhandogi]

• Change the dark mode icon, I would like to add this type of icon.

• Add repo link with GitHub icon.
• Site will be refreshed when the user clicks on the tru weather title.

[github-actions]

Congratulations, @BamaCharanChhandogi! 🎉 Thank you for creating your issue for weather-app project. Your contribution is greatly appreciated and we look forward to working with you to resolve the issue. Keep up the great work! Should you have any queries or require guidance, do not hesitate to ask.

[BamaCharanChhandogi]

@1010varun what do you think?