New event Spell Check

[MillhioreBT]

Pull Request Prelude

• I have followed [proper The Forgotten Server code styling][code].
• I have read and understood the [contribution guidelines][cont] before making this PR.
• I am aware that this PR may be closed if the above-mentioned criteria are not fulfilled.

Changes Proposed

Did you ever think about blocking all spells, or maybe just one specific spell for a player? Or for a group of players? Or maybe something even crazier?

Well, it's actually possible to do that using global variables or player storage. However, in order for it to work properly, we really have to modify and add some extra conditionals to all the spells we want to control. This is totally horrible.

This new event comes to solve this problem. The onSpellCheck event has two arguments: one is the player and the other is a table with some fields. In these fields, you can find some properties of the spell in question, for example the name.

Here is an example code fragment using the new event:

local event = Event()

function event.onSpellCheck(player, spell)
	if BossEvent:hasPlayer(player) then
		player:sendCancelMessage("You can't use spells in this event.")
		return false
	end
	return true
end

event:register()

Issues addressed: Nothing!

[EvilHero90]

Looks fine to me