trad_rack and extruder: add support for using additional extruder steppers with trad rack#519

Draft

rsghosh wants to merge 3 commits intoKalicoCrew:mainfrom rsghosh:wip-trad-rack-extra-extruders

+188-45

Commits on Jan 3, 2025

Transfer some of the changes to extruder.py from a893f98:
rsghosh
committed
Allow syncing an ExtruderStepper object to anything that has the "link_extruder_stepper" and "unlink_extruder_stepper" methods (instead of only to PrinterExtruder objects)
rsghosh
committed

Commits on Jan 4, 2025

Allow adding extra extruder steppers to trad rack
rsghosh
committed