[REQUEST] Add real-world units to trait outputs instead of voxel numbers and the like

[kenanoestreich]

Type of Request

• Functionality
• UX/UI
• Documentation
• Quality of Life
• Other

Is your feature request related to a problem? How pervasive is the problem? Please describe.
It is uninformative to output traits like Volume in terms of voxel numbers

Describe the solution you'd like
Hopefully, we can get this information from the .dat header files and do a simple conversion at the end.

Describe alternatives you've considered
If we can't find this info in .dat files, an option to manually input voxel sizes could help.

Additional context
N/A