Uncrackable

Makes the dragon egg indestructible by any means, and adds minor feedback improvements to the teleportation mechanic.

Functional changes:

• Pushable by pistons
• Indestructible by mining or explosions
• Lands on top of slabs and other pushable non-full blocks
• Destroys blocks when landing inside (for non-full blocks like torches, or if a block gets pushed inside while falling)
• Doesn't time out and drop as an item after 30 seconds like other falling blocks
• Remains a falling block if landing above build height
• Wraps around to build height when falling into the void
• Failing to teleport will not delete the egg

Feedback improvements:

• Teleportation particles correctly point to the new location
• Teleportation sound effect added

This mod is only required on the server side, though the client will generate its own teleportation trail without it.