Add Implementation of Day 7 question (One Edit Away) in various languages

[MadhavBahl]

Check list:

• Created a folder with the name of language you code inside /day7/ directory (https://github.com/CodeToExpress/dailycodebase/tree/master/day7)
• Added your Codes
• Tested your codes
• Added credits (author and date) at the top of the code
• Updated README.md - https://github.com/CodeToExpress/dailycodebase/blob/master/day7/README.md
• Added yourself as a contributor using all-conributors-cli

[Grace0Hud]

Hello! I am new to github collaboration, I submitted a pull request earlier for day 4 and I believe that my work for Day 7 is included in that request. I hope that you are able to view both of them :)