Folia support and custom minimessage output for papi

[UsainSrht]

Added folia support with morepaperlib, using GracefulScheduling instead of BukkitScheduler.
Added a custom minimessage output for symbols to use it as rn minimessage doesn't support the serialization of the signed texture head components.

<signed_head:TEXTURE:SIGNATURE>
example code to use it

    TagResolver resolver;

    public SignedHeadTag(Set<String> names) {
        resolver = TagResolver.resolver(names, this::create);
    }

    Tag create(final ArgumentQueue args, final Context ctx) {

        String texture = args.popOr("signed head needs a texture").value();
        String signature = args.popOr("signed head needs a signature").value();

        Component headComponent = Component.object(
                ObjectContents.playerHead().profileProperty(
                        PlayerHeadObjectContents.property("textures", texture, signature)
                ).build()
        );

        return Tag.selfClosingInserting(headComponent);
    }

I was able to use fancytags in TAB plugin's scoreboard with this setup.