toolchanger and mmu frontend support with spoolman

[Marshalldog]

Is your feature request related to a problem? Please describe

Hey. Currently building a tool changer and I'm using spoolman to track filament usage. I asked if spoolman supports tracking multiple filaments (for multiple toolheads) and the dev confirmed its supported and just needs to be added on the mainsail frontend: Donkie/Spoolman#239

Describe the solution you'd like

here is an idea for the UI.
So each extruder can be assigned a different filament

Describe alternatives you've considered

No response

Additional information

No response

[meteyou]

Thx for your request. i have to build a test rig to implement this feature.

[meteyou]

@Marshalldog I have only now seen that you have made the FR in the wrong repo. this is only for the SBC image.