Add the /friend command

[Wyzards]

Task Title

Task: Add the /friend command

Task Description

The /friend command will allow any player on any server to add any other player as their friend. It will be used by any player via /friend

The username is case insensitive. The player does not need to be online, but does have to be in our database (have joined before). This will add the new player to the users friend list. The new friend will receive a message that this this player has added them as a friend. This should have a 10 minute cooldown, to prevent them from being spammed with /friend messages.

When the player does /friend with no arguments it should open a GUI. This GUI will list all friends the player has. If that player also has them as a friend, they should be able to view what server that player is on, and be able to easily teleport to their current server (or attempt to, it may be full after all).

This menu can also be used to unfriend someone. The /unfriend command should take a player username as an argument and remove them as a friend.

Epic Parent

Feature: Friend System