- add support for variants

- Config should now be more dynamic
- default rules for bucketing mobs
- Moved style configs under 'bucket-style'
- Adjusted handling to use new formats

- getItemModel now returns the actual key
- validation of the string happens in the Texture class now
- Started work on making capture items and captured items more customizable

…dling bugs

ConfigHandler was reading from bucket-style.* keys that never existed in
config.yml; the correct section is captured-item-style.*. This silently
ignored every style setting (name, glint, material, item model, resource
pack toggle) and fell back to Java-side defaults. Fixed all key paths.

config.yml had item-model: default, which is not a valid NamespacedKey and
logged a warning on every reload. Changed to minecraft:bucket.

Entity release now uses NMS Entity.setPos() via reflection before
addEntity() is called, so mobs spawn at the release location directly.
The previous approach (teleport before/after addEntity) broke when the
capture chunk was unloaded, because teleport() requires the entity to
already be in a world, and addEntity() always used the stored NBT position.

Additional fixes:
- Enchantment glint config option was always hardcoded to true; now reads
  isEnchantmentGlint() from ConfigHandler
- Dead-code loop in setupTypes() added disallowed types to entityRules then
  immediately cleared them; removed the loop
- onBucketMob and onUnbucketMob now guard on EquipmentSlot.HAND to avoid
  processing off-hand duplicate events
- Event is now cancelled before world mutations in onBucketMob so other
  listeners do not see a half-removed entity
- Debucket command: added null check for empty main hand, and now handles
  both the legacy string tag and the new byte-array tag
- Texture config load error now goes through the SLF4J logger instead of
  printStackTrace()

…-plugin.yml