Giveaway command

This Firebot setup adds a giveaway command that works with subcommands.

(Sub)commands

!giveaway - Describes what will be given away.

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

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

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

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

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

!giveaway draw - Draws a winner from the file.

!giveaway clear - Clears the file.

!giveaway [anything] - A fallback command in case users write a message after the command, it will display the regular !giveaway message.