YAML support for DynamicOps / DataFixerUpper based on SnakeYaml.
Create a new instance of SnakeYamlOps and use it just like you would JsonOps.
No INSTANCE field exists, as it is not thread safe due to some internal state stored by SnakeYaml.
See methods in YamlHelper. Use YamlHelper.sortMappingKeys to ensure a stable sort for Minecraft Datagen.