Don't require catalogue name in `TaskCatalogue` if we're cataloguing one item only!

[TacoTechnica]

Most item catalogue names match their translation key/name, but EasyIdle noted there are some inconsistencies (like minecart_with_hopper should be hopper_minecart). This shouldn't be normally allowed.

The whole point of named keys is to

1. Open resources to command usage/serialization
2. Catalogue a resource satisfied by multiple potential items (ex "planks")

When 2) doesn't apply, there's no reason to manually type in a catalogued name when it can be easily auto-generated.