BETA: Datapack part for [L6272] - Abnormal visual effect rework:

	* Moved abnormal visual effects from effect to skill.
	* Added missing !JavaDocs.
	* Removed unused `L2EffectType`.
	* Removed `L2AbnormalZone`, instead use `L2EffectZone` with a custom skill.
	* Added all missing abnormal visual effects.
	* Fixed/removed all custom abnormal visual effects.
	* Removed hardcoded abnormal visual effects, they must be present in skill or set to the character.
	* Added fixed all values for abnormal visual effects.
		* Thanks to: Nos
	* Fixed abnormal visual effect admin menues.
		* Added event abnormal visual effect menu, although they are not working yet.
	* Removed multiple methods to start/stop abnormal visual effects.