Try to make recipe serialisers more reusable

This attempts to reduce some duplication in recipe serialisation (and
deserialisation) by moving the structure of a recipe (group, category,
ingredients, result) into seprate types.

 - Add ShapedRecipeSpec and ShapelessRecipeSpec, which store the core
   properties of shaped and shapeless recipes. There's a couple of
   additional classes here for handling some of the other shared or
   complex logic.

 - These classes are now used by two new Custom{Shaped,Shapeless}Recipe
   classes, which are (mostly) equivalent to Minecraft's
   shaped/shapeless recipes, just with support for nbt in results.

 - All the other similar recipes now inherit from these base classes,
   which allows us to reuse a lot of this serialisation code. Alas, the
   total code size has still gone up - maybe there's too much
   abstraction here :).

 - Mostly unrelated, but fix the skull recipes using the wrong UUID
   format.

This allows us to remove our mixin for nbt in recipes (as we just use
our custom recipe now) and simplify serialisation a bit - hopefully
making the switch to codecs a little easier.

projects/common/src/testMod/kotlin/dan200/computercraft/gametest/Recipe_Test.kt

@@ -4,6 +4,7 @@
 
 package dan200.computercraft.gametest
 
+import com.mojang.authlib.GameProfile
 import dan200.computercraft.gametest.api.Structures
 import dan200.computercraft.gametest.api.sequence
 import dan200.computercraft.shared.ModRegistry
@@ -11,6 +12,7 @@ import net.minecraft.gametest.framework.GameTest
 import net.minecraft.gametest.framework.GameTestAssertException
 import net.minecraft.gametest.framework.GameTestHelper
 import net.minecraft.nbt.CompoundTag
+import net.minecraft.nbt.NbtUtils
 import net.minecraft.world.entity.player.Player
 import net.minecraft.world.inventory.AbstractContainerMenu
 import net.minecraft.world.inventory.MenuType
@@ -41,11 +43,10 @@ class Recipe_Test {
 
             val result = recipe.get().assemble(container, context.level.registryAccess())
 
-            val owner = CompoundTag()
-            owner.putString("Name", "dan200")
-            owner.putString("Id", "f3c8d69b-0776-4512-8434-d1b2165909eb")
+            val profile = GameProfile(UUID.fromString("f3c8d69b-0776-4512-8434-d1b2165909eb"), "dan200")
+
             val tag = CompoundTag()
-            tag.put("SkullOwner", owner)
+            tag.put("SkullOwner", NbtUtils.writeGameProfile(CompoundTag(), profile))
 
             assertEquals(tag, result.tag, "Expected NBT tags to be the same")
         }