Add a PR template

[MadhavBahl]

Is your feature request related to a problem? Please describe.
No, it is not related to a problem.

Describe the solution you'd like
It would be great if there would be a PR template regarding the checklist of the actions performed and the description

[ajmalsiddiqui]

You're right, we probably need a PR template. Apart from the usual components of the PR template, anything specific to Pythonista should also be added. As of now, I can't think of anything specific off the top of my head, but the discussion can happen in this issue thread.

This issue is up for grabs!

[1cedsoda]

What special pythonista components are these?

[1cedsoda]

The Hacktoberfest is over.

[gshanbhag525]

Can I add a PR template for this repo?