Allow using ResourceLocations in CompoundCondition

[sylv256]

Use Codec.either for the conditions field in CompoundCondition to allow datapacks to specify ResourceLocations where other conditions are stored rather than a condition object verbatim.
For example, instead of:

{
	"type": "silicate:compound",
	"conditions": [
		{
			"type": "silicate:entity_type",
			"param_type": "silicate:this_entity",
			"entity_types": ["minecraft:player"]
		},
		// ...
	]
}

...you could use this:

{
	"type": "silicate:compound",
	"conditions": [
		"examplemod:foo",
		"examplemod:bar"
	]
}