[daniel-skopek]

Summary

A Sulfur Cube with absorbed TNT explodes as an EntityExplodeEvent whose entity
type is SULFUR_CUBE, not TNT. ExplosionListener only matched primed TNT
and TNT minecarts, so these explosions bypassed TNT_DAMAGE and
WORLD_TNT_DAMAGE. On protected islands that allowed destroying blocks and
damaging entities even when TNT damage was disabled. The AOneBlock magic block
itself was already protected by BlockProtect, but player builds around it were
not.

Changes

• Resolve SULFUR_CUBE at runtime with findFirstMatchingEnum(...), so the
  listener still loads on servers without the entity.
• Include SULFUR_CUBE in TNT_TYPES, making Sulfur Cube explosions follow the
  existing TNT_DAMAGE and WORLD_TNT_DAMAGE flags for both blocks and entity
  damage.
• Gate player ignition of a Sulfur Cube with flint and steel or a fire charge by
  TNT_PRIMING, matching the existing TNT block behaviour.
• Add regression tests covering allowed and denied Sulfur Cube explosions,
  entity damage, and priming.

Testing

• ./gradlew test --tests 'world.bentobox.bentobox.listeners.flags.protection.*'
• ./gradlew test
• git diff --check

Notes

AOneBlock still ships TNT_DAMAGE: true by default; servers that want Sulfur
Cube explosions blocked there must set it to false. Ignition by redstone,
dispensers or environmental explosions has no player actor, so TNT_PRIMING
does not apply to those paths, but the resulting explosion still respects
TNT_DAMAGE.