Support wildcard or regexp matcher for NBT predicates

[reserveword]

you can implement this by adding this to dev.emi.chime.ChimeClient#matchesJsonObject:

			// regex match
			if (key.startsWith("chime:regex:")) {
				// regex match can't capture non-existent predicates
				if (element.isJsonNull()) return true;
				String regex = key.substring(12);
				return tag.getKeys()
						.stream()
						.filter(k -> k.matches(regex))
						.anyMatch(k -> tag.contains(k) && matchesJsonElement(element, tag.get(k)));
			}

this will interpret json labels like chime:regex:***** as regex labels, and won't cause conflicts because we used chime: namespace.

In this implementation regex labels will match all the NBT elements in tag that has a key matching the regex, and return true if any element matches.