* make it boot without biome lib
* make luacheck semi sane
* make fast growth saplings work
* make fast saplings respect nodes there growing on
* make regualr saplings work
* fix some luacheck warnings
* add github actions for luacheck
* bump luacheck line limit, as to gracefully handle long tree rules
* switch over to inline luacheck length rules
* fix screenshot warning
* make tree generation work
* add settings from last night
* comment out new biome lib nonsense added
* tune spawning to be better
* turn down fallback ratio
* translate new abm patch to not use biome lib
* add ethereal since its still behaving badly :(
- Improve french translation
Warnings:
- many untranslated new strings for German and Spanish translations (some help would be appreciated)
- Inner and Outer Stairs are still badly translated (since there is [no support for this in stairs api yet](https://github.com/minetest/minetest_game/issues/2582)).
