Previously we would register the recipes within our code, but the
advancements were written manually. This now generates JSON files for
both the advancement and recipe.
While this does mean we're shipping even more JSON, we'll need to do
this for 1.13 anyway, and means our advancements are guaranteed to be
consistent.
On a side note, a couple of other changes:
- Turtle upgrades are now mounted on the right in the creative
menu/fake recipes. This means the upgrade is now clearly visible in
the inventory.
- We no longer generate legacy turtle items at all: we'll always
construct turtle_expanded.
- Several peripheral items are no longer registered as having sub-types
(namely advanced and full-block modems).
- We only have one disk advancement now, which unlocks all 16 recipes.
- We have removed the disk conversion recipes - these can be
exposed through JEI if needed.
