Bridge Paper-specific trait methods through NMS

[airgalaxie]

Moves direct Paper/Bukkit calls for versioned entity trait behavior behind the NMS bridge.

Changes:

• Route CopperGolem weathering tick updates through NMS
• Route Mannequin hide-description updates through NMS
• Add default NMSBridge methods for these calls
• Implement them in the active NMS modules

This keeps citizens-main from depending directly on version-specific Paper API methods while preserving the existing behavior.

Tested with:

• mvn -Pdev -DskipTests package

[fullwall]

When were these methods added?