[FEATURE REQUEST]Long filename support

[Ainmimdal]

I believe Marlin just added support for long filenames for prettier file manager in octoprint (using M20 L). Can we have this on ESP3d? 😄
reference: MarlinFirmware/Marlin#22271

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[luc-github]

the upload and print commands still need the short name ...
I will have look when release is out

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[luc-github]

I gave a try because again Marlin break the backward compatibility on M20 output ...
Here output for M20 and M20 L

M20
Begin file list
CUBE.GCO 210240
CUBE01.GCO 2089832
SUPPORT2.GCO 4613256
ARCHIVE/CUBE.GCO 210240
ARCHIVE/CUBE-C~1.GCO 210240
NEWFOL~1/SUPPORT2.GCO 4613256
End file list
ok

M20 L
Begin file list
CUBE.GCO 210240 ???
CUBE01.GCO 2089832 ???
SUPPORT2.GCO 4613256 ???
ARCHIVE/CUBE.GCO 210240 Archive/???
ARCHIVE/CUBE-C~1.GCO 210240 Archive/CUBE - Copy.G
NEWFOL~1/SUPPORT2.GCO 4613256 New folder/???
End file list
ok

the result is buggy so it won't be implemented any time soon I think