Mobs Attempt Parkour Updated

First release of the port. It covers Minecraft 1.21.1 and 26.3, on Fabric and NeoForge.

• Barribob's jump AI from Mobs Attempt Parkour 0.5.2, rewritten in Java for current Minecraft.
• New: a NeoForge version.
• Removed: the Kotlin and Maelstrom library dependencies. The mod needs nothing else on either loader.
• The config file (config/mobs_attempt_parkour/config.json) has the same format and defaults as the original.
• Changed: in mid-air steering, mobs now steer from within their AI goal rather than a separate scheduler, so a mob that dies or lands stops steering straight away.
• Fixed: a mob approaching the edge at an angle could miss its take-off point and walk into the water or gap instead of jumping.
• Doors are always treated as blocking. The original's material checks no longer exist in Minecraft, and the result is the same.