Add support for Shelf item logging

[guss-alberto]

Note

Adds 1.21 shelf detection and chain-aware item transaction logging, exposing new shelf utilities in the Bukkit interface and adapter.

• Adapters:
  • Interface (BukkitInterface): Add isShelf(Material) and shelfMaterials().
  • Base (BukkitAdapter): Provide stub implementations for isShelf and shelfMaterials.
  • 1.21 Adapter (Bukkit_v1_21):
    • Implement shelf support: maintain SHELVES set from Tag.WOODEN_SHELVES, implement isShelf and shelfMaterials.
    • Add shelfMaterials() to BlockGroup.CONTAINERS during initialization.
    • Minor: class no longer declares implements BukkitInterface explicitly.
• Player interactions (PlayerInteractListener):
  • Handle shelf right-clicks: ignore back-face clicks, determine center for chained shelves (LEFT/CENTER/RIGHT), and queue InventoryChangeListener.inventoryTransaction for the correct block(s).

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[cursor]

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[cursor]

Bug: Type mismatch causes instanceof check to always fail

The check center instanceof Shelf will always evaluate to false because center is a Block while Shelf is a BlockData interface. These are incompatible types in Bukkit's API. The condition likely intended to check center.getBlockData() instanceof Shelf instead. This causes the code to always take the else branch, incorrectly logging left and right shelf blocks even when only a chain of 2 shelves exists.

 

[Intelli]

@guss-alberto Please review the above, and test/confirm desired behavior once resolved.