Add list of supported commands

[kuychaco]

Pop up modal window with list of supported commands

[brianamarie]

Hello @kuychaco! 👋 I was just looking to open an issue requesting this, but I saw this already exists. I would ❤️ to know if there was a list of supported commands, whether it's a popup, or a document as a part of this repository.

[kuychaco]

Fixed by #86.

Thanks @IanLee1521! 💥

Typing help in the command box will display the following:

[brianamarie]

Thank you @kuychaco & @IanLee1521! 🎉