Add documentations to this package.

[AraHaan]

I also think we should add documentations to this package after we take care of the command line, followed by setup.py later. Documentations might help people with both the command line and using it in their own python code directly. For this I dont really mind which one they use as in the end they should be able to get the same result. Not sure if the documentations should be written in markdown on rST like discord.py is so we can use (shpinx) and get similar looking docs like the rewrite ones?

I am currently not worried on format but more on the looks.

[Martmists-GH]

We use sphinx for all our projects documentation as readthedocs.io can autobuild on commits to automatically update.

[AraHaan]

I think that should be good for the docs. 👌