metadata: support multiple filaments length for prusaslicer

[bakatrouble]

The metadata parser was unable to parse used filament length when the slicer is set up for MMU, resulting in line
; filament used [mm] = 0, 0, 0, 0, 31653.68

Signed-off-by: Aleksey Frolov <[email protected]>

[Arksine]

Thanks. The changes look ok, however the commits need to be signed off before they can be merged. It is sufficient to add the Signed-off-by line to the PR if you don't want to amend the commits themselves.

[bakatrouble]

Thanks. The changes look ok, however the commits need to be signed off before they can be merged. It is sufficient to add the Signed-off-by line to the PR if you don't want to amend the commits themselves.

Added to the pr message

[Arksine]

Thanks, however the signature requires your real name, not an alias.

[bakatrouble]

Changed

[Arksine]

Thanks.