Added wrap-up of gsoc-21 @satyasaibhushan

[satyasaibhushan]

added wrap-up file and add it to the list in Readme.md

[satyasaibhushan]

Also, for the assets used while writing the wrap-up, I had to use the links to my repo.
I think maintaining an assets folder inside the project_wrapups folder might come in handy for all the students.

[outofambit]

thank you @satyasaibhushan! could you add alt text for those two images in the last section? then i can merge. thank you!

[satyasaibhushan]

Here you go @outofambit !

[outofambit]

thank you @satyasaibhushan ! ✨