Pandora's Box

- Meltdown effect holders now have their own datapack registry.
- Fixed fake death effect.
- Block tags can now be used in randomised item lists for box effects (and now will appear again in existing effects).
- Reworked features used by the mod to use vanilla configured features where possible and for the remaining ones to have feature configurations.
- Effect renderers have been refactored to extract effect data into render states.
- Pandora's Box now has a proper enchantment glint in item, block, and entity forms if it was enchanted.
- The `pandorasbox:effect_holders` component has new fields, `random_selection`, a set of effect holders to select from, and `selects_random`, an override to allow it to still add on random effects even if `effect_holders` is not empty.
- Renamed field `floor_blocks` in the `create_dome` effect creator to `dome_blocks`, original one was an error.
- Removed effect creators `convert_generic`, `convert_to_city`, `convert_to_farm`, `convert_to_happy_fun_times`, `convert_to_nether`, `convert_to_rainbow_cloth`, `gen_trees`, `gen_trees_odd`, `lava_cage`, `create_pool`, `replace_blocks`, and `transform_blocks` as they had their functionality consolidated into sub-creators of the new `generate` creator.
- `duplicate_box` creator now has an `included_effect_holders` field, to restrict which effect holders it can produce.
- `meltdown` creator now has an `included_meltdown_holders` field, to restrict which meltdown effect holders it can produce.
- Equipment sets have been moved to a datapack registry `pandorasbox:equipment_sets`.
- `spawn_item_set` creator now takes a collection of equipment sets, replacing the `sets` field with `equipment_sets`.
- When a cityscape chest spawns with an equipment set, it will now name its chest the name of the set.
- `spawn_many_same_items` creator now has a `number` field, taking a random integer.
- Meltdown effect now shoots particle beams towards new effects.
- Added box special entity `pbspecial_skeleton_horseman`, spawning a skeleton wearing an enchanted iron helmet and holding an enchanted bow on top of a skeleton horse.
- Equipment given to entities spawned by the box is much stronger.
- All items the box could produce that shared weights and max counts have been merged into tags.
- Added entity type `pandorasbox:giant`, a functional version of `minecraft:giant`, spawning from all box effects that spawn entities.