Automatically adjust maxFallHeightNoBucket based on the player's current health

And possibly also take into account their armor / feather falling status. The idea being that no matter what, if the bucket fails it won't kill them. Right now that's only the case if they're at full health, the max fall height defaults to 23.

Idea blatantly stolen from KAMI. https://github.com/zeroeightysix/KAMI/pull/50/files#diff-2c12fd35869a5a7a3abc2c15dfd05debR30

Search the repository for maxFallHeightNoBucket, then compare its behavior with the referenced KAMI pull request. Determine how current health and, if supported by the design, armor or Feather Falling affect the safe fall height; done means a failed bucket does not kill the player under those conditions.

Written by the indexing model from the issue text.