Addition of Floating Sidebar

[shalini-bhandari]

@gauravsingh1281 kindly assign me under gssoc-ext and hacktoberfest-accepted

[github-actions]

Congratulations, @shalini-bhandari! 🎉 Thank you for creating your issue for Rentalog. 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.