[UNTESTED] Add SpoolManager, FilamentManager, and GCode support. Fix some bugs

[jukebox42]

[UNTESTED] I would not try this branch. Opening so I can keep track of changes easier.

This version adds a slew of support and bug fixes

• [x] Fix version detection 🤦. Sorry to the 300+ users who wont see the new version. Prob should have tested that first man...
• [x] Add spool manager detection and filament loading
• [x] Add filament manager detection and filament loading
• [ ] ~Add gcode detection (not implemented even though you can select it)~ pushed to next release
• [x] Support remembering previous filament
• [ ] ~Show both current and next filament when loading/unloading~ pushed
• [x] Fix remembering filament states on settings save
• [x] Make settings clearer for default filament
• [x] Fix bug with default filament
• [x] give MMU2filamentselect props
• [x] Move a few functions to self so other plugins can use them if they want (more to be added)