feat(image): position map

[Olaf-Wolf3D]

Description

Render a position map as image from mesh with padding.

Fixes # TECHART-359

Type of change

Please delete options that are not relevant.

• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

How Has This Been Tested?

• Unit tests, Windows 11, hatch run test

Checklist

• I confirm that the changes meet the user experience and goals outlined in the design plan (if there is one).
• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have updated any version info, if necessary.
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes