Add description of all the new codes added in Readme

[prateekiiest]

Just like for Tic-Tac-Toe we have a description here https://github.com/prateekiiest/Code-Sleep-Python#tic-tac-toe

Add so for other codes in README too

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.