Feature: !github command

[ToxicKidz]

We have the !pypi which is useful, and I think that a !github command can be useful to share repositories with others.

Usage

!github python-discord/bot Sends info about the bot (this one) repo.
!github search discord.py Shows search results for the term discord.py
Maybe some other command(s)

Additional Details

We can use the github api for this.
I would like to implement this command.

[MrKomodoDragon]

Like this idea, but maybe it could be a feature of Sir Lancebot, as it isn’t “essential”

[MarkKoz]

See #629