Add functionality to show and hide an events channel

[social-anthrax]

New Functionality

New Mod command: Mods will now be able to show and hide an events channel to simplify running weekly events so that the server doesn't get cluttered.

Added

Utils.hs

• Added function to convert any snowflake into an integer
• Added function to move Channel to a different position in guild given guild, channel, and location
• Added handler for mod only commands

  ModifyEventsChannel.hs

• Added receiver for showEvents
• Added function that handles showing and hiding events
  • Moves the position of a category
  • Changes visibility settings for @everyone

    Changes

    Utils.hs

• Changed the way Moderators are verified to accept a list of role names.
• Added error function to reduce code duplication

[social-anthrax]

Will leave branch up for now, as I would like to try and make the events channel an editable config file so that any guild can declare an events category.

[social-anthrax]

Looking into the possibility of getting previous roles and then using bitwise operations to modify the role rather hard setting it as is happening now.