Giveaway command

This setup adds a command that you can use to organize a giveaway in your chat.

(Sub)commands

!giveaway - Describes what will be given away.

!giveaway start - Clears the role and opens the giveaway.

!giveaway enter - Enter the giveaway, adds username to the role.

!giveaway leave - Leave the giveaway, removes username from the role.

!giveaway close - Closes the giveaway to prevent users from entering.

!giveaway open - Opens the giveaway without clearing the role.

!giveaway draw - Draws a winner from the role.

!giveaway clear - Clears the role.

!giveaway [anything] - A fallback command in case users write a message after the command. It displays the default !giveaway message.