[WIP] refactoring of autolabor managers

[ab9rf]

Project to refactor labor management plugins.

The goal is to consolidate autolabor, autohauler, and labormanager under a single supervisor.

This is step 1 of a yet-to-be-determined number of steps. Tagged WIP for obvious reasons.

[myk002]

ongoing discussion in https://github.com/DFHack/dfhack/discussions/1944

[ab9rf]

outdated and obsolete, closing