Port Spectrum to 1.20

[Noaaan]

Spectrum 1.20

Will re-target towards a 1.20 branch once I can find the time.
Reason for a PR over directly pushing onto a separate branch is to note down what exactly changed between 1.19 and 1.20.

Non-exhaustive list of version changes

• LootContextParameters.Builder get() no longer has a nullable. Check for the optional, or assume always safe?
• MatrixStack replaced most places with DrawContext
• Format of advancements changed. Most triggers now need a conditions + condition field, with a location predicate. The location predicate follows the old format most of the time, so main challenge is just to find and wrap them.
• world is now private in tons of places, like entities, meaning you need to use getWorld() instead
• The minecraft:alternative loot condition is now named minecraft:any_of. A new minecraft:all_of also exists now
• A lot of packages moved. Registry for example now lives in its own packages instead of util.
• Damage Sources underwent a major refactor. Since its now tag-driven some testing should be done to ensure it behaves correctly
• ExplosionModifiers was refactored, and needs testing to see whether it was ported correctly.
• ...and a ton more smaller changes. its over 1300 files changed, so its a bit hard to review.

Current problems

• Advancements are broken. Mainly due to malformed location predicates. Now fixed ✅
• Patchouli does not work due to everything being placed under data. fixed by Daf ✅
• Colorful Hearts (formerly Health Overlay) does not use a DrawContext, meaning we have to make one ourselves for our compat Now fixed ✅
• InkProjectileKillingCriterion is not implemented correctly Now fixed ✅
• Chest Textures do not work, as they are not placed in any atlas at the moment. Only thing holding back updating this is verifying that the chests were properly renamed Now fixed by moving into block atlas ✅ Needs verification as some chest names in lang and classes seem to be un-renamed.
• SpectrumRegistries should be ported to the new format which does not take in an Entity class, as it is deprecated. Now fixed thanks to Electro ✅
• ~~GatedSpectrumEmiRecipe should be changed to respect the DynamicRegistryManager. It needs to grab this from some world, or pass an empty DRM (not ideal)~~Fixed by Electro ✅

[DaFuqs]

Created a 1.20.1 branch 👌

[Suya1671]

Any updates on this? The last commit was 2 weeks ago

[Noaaan]

This branch/PR is still being worked on. I will note that release-wise this will release at a later time than the DD update, so that there is time to test things. Its only a bit behind upstream at the moment

[DaFuqs]

Merging this, before github gives up.
3.5k files changed. Scary.