Make visual effects serializable

[Romitou]

Description

Started by @TPGamesNL in PR #4123 (the commit has been cherry-picked and the author has been kept for credits), providing a serializer for VisualEffectType allows to serialize VisualEffect correctly. In fact, this should have been handled by simpleClassLoaders, where this specific class was originally registered.

However, the Yggdrasil#getSerializer method did not return a serializer: a SimpleClassResolver extends from ClassResolver and not from a YggdrasilSerializer like the others. A fix is therefore to directly register this serializer at the root of classResolvers.

https://github.com/SkriptLang/Skript/blob/master/src/main/java/ch/njol/yggdrasil/Yggdrasil.java

---

Target Minecraft Versions: any
Requirements: none
Related Issues: #4196

[Efnilite]

also you can remove the license from the top of the files

[sovdeeth]

Does this handle types with data, like vibrations or dust particles? Also, I'd like to see some regression tests if possible.

[ShaneBeee]

doing a quick look thru the VisualEffectType code, I see this regarding IDs

public String getId() {
	return effect.getDeclaringClass().getSimpleName() + "." + effect.name();
}

The issue here is the ID is the class name and enum name.
Problem comes from the fact Mojang has changed particle names several times in the last few versions.
And as of I believe 1.21 Bukkit has changed a whole bunch of the enums.
That said, this is not version safe.