Add a Forward command

[DevJake]

Allows an individual to select a message, either by ID, or entering the username of the person who entered it. If a username is entered, the most recent message from them in the current textchannel (unless specified to a guild in general) should be used. A range of messages should also be selectable by entering either a range of IDs, or a range of timestamps.

These messages can then be forwarded to a specified channel in any guild. Also need to add permissions for this command.