Un-hardcode garland sanity rate

[Treeways]

It'd be great if the garland had a configurable passive sanity rate in ticks:

SanityDescentIntoMadness/src/main/java/croissantnova/sanitydim/SanityProcessor.java

Lines 77 to 86 in a6e82e8

	ItemStack headItem = player.getItemBySlot(EquipmentSlot.HEAD);
	if (headItem.is(ItemRegistry.GARLAND.get()))
	{
	// TODO: unhardcode
	passive -= .00005 * ConfigProxy.getPosMul(dim);
	if (garlandTimer <= 0)
	headItem.hurtAndBreak(player.isInWaterOrRain() ? 2 : 1, player, ent -> {});
	}
	if (garlandTimer <= 0)
	garlandTimer = MAX_GARLAND_TIMER;