Add PLY file format support

[KodeMunkie]

Is there an existing issue for this feature request?

• [X] I have searched the existing issues

Is your feature request related to a problem?

I'd like to import files that are in the .ply format, including the per vertex colours within the format as that is the main reason for using it with other editors that don't support .obj with material or .3mf

Which printers will be beneficial to this feature?

All

Describe the solution you'd like

The File -> Import dialog should offer to import .ply suffixed files and load them with their associated colour information. A text format version of the ply importer would be MVP, but it would be better to support both the binary and text variants if possible.

Describe alternatives you've considered

1. Using Obj with Mtl file (as seen in Bambu Studio ticket https://github.com/bambulab/BambuStudio/issues/1892) however this is an extra step for me using Meshlab, and conversion of the colour information appears to be incorrect (this isn't just a fault with Meshlab) so I'd like to avoid the conversion altogether.
2. Using 3mf, however colour information in 3mf is non standard or unsupported in many tools.

Additional context

No response

[github-actions[bot]]

Orca bot: this issue is stale because it has been open for 90 days with no activity.

[KodeMunkie]

Not stale, I'm still waiting for it to be triaged.

[github-actions[bot]]

Orca bot: this issue is stale because it has been open for 90 days with no activity.

[KodeMunkie]

Not stale, I'm still waiting for it to be triaged.