[FeatureRequest]: Would like SD card access on 12864 in SBC configuration

[jltx1]

Is your feature request related to a problem? Please describe.

See: https://forum.duet3d.com/topic/32997/duet-3-sbc-with-12864-display-sd-card-access

I would also like access to the SD file list through the menu system on the 12864 display so I can initiate a print while physically standing in front of the printer. Today I have to go to a different room where my computer sits.

Yes, I can use a separate SD card in the display itself. But the issue is that I normally send files over the network to the printer which only goes to the internal card. Then something requires some attention and I want to restart that file but it is inaccessible from the display.

Describe the solution you propose.

Ex. It would be great if...

Describe alternatives you've considered

Ex. A workaround exists but it is tedius, for example...

Provide any additional context or information.

Ex. Photos, mockups, etc.