Pocket Door

**Pocket Door 1.7.2 (Minecraft 1.21.1 NeoForge)**

Changes
- The exit spot is now left alone unless it is actually dangerous. You come out exactly where you walked in unless that would put you inside blocks, in lava, or over a drop of more than 20 blocks.
- When the spot is dangerous, you come out at the nearest safe spot, never more than 10 blocks from the door.
- Nobody is sent to spawn any more. If nothing within reach of the door is safe, you come out at the door anyway and get a message.

Fixes
- A step down, a slab or carpet in front of the door no longer counts as an unsafe exit.