Implement hanging signs

[MEMOxiiii]

Summary

This PR implements hanging signs for all registered wood types, including wall and ceiling attachment, sign editing, block actor handling, support checks, and cascading neighbour updates.

Changes

• Add HangingSign and HangingAttachment.
• Support wall-mounted and ceiling-mounted hanging signs.
• Support attached and non-attached ceiling chains.
• Add placement, support, drops, interaction, and rotation behaviour.
• Support editing hanging sign text.
• Handle hanging sign block actor data.
• Process cascading neighbour updates when connected hanging signs lose support.
• Register hanging sign blocks and items for every registered wood type.
• Add block hashing and hash generator support.

Integration note

Hanging signs are registered dynamically for every wood type. As a result, bamboo_hanging_sign will also be registered once the bamboo wood type PR (#1292) is merged.