Add PBR material support for planar texture alignment

[Aqil-Ahmad]

Description

Implements planar texture alignment for PBR materials, allowing checkbox to work with PBR texture transforms.

Related Issues

Fixes #2975

Issue Link:

---

Checklist

Please ensure the following before requesting review:

• I have provided a clear title and detailed description for this pull request.
• If useful, I have included media such as screenshots and video to show off my changes.
• The PR is linked to a relevant issue with sufficient context.
• I have tested the changes locally and verified they work as intended.
• All new and existing tests pass.
• Code follows the project's style guidelines.
• Documentation has been updated if needed.
• Any dependent changes have been merged and published in downstream modules
• I have reviewed the contributing guidelines.

---

Additional Notes

Currently:
Using Blinn-Phong Values for Alignment

Alternatives (seeking input):
Modify calcAlignedPlanarTE() to accept PBR transforms directly, OR
Create a new calcAlignedPlanarPBR() function

[Aqil-Ahmad]

/claim #2975

[akleshchev]

This looks wrong. Calling setTEScale not only sets values, but also marks object for a rebuild so should be avoided when possible. This code looks like either a workaround or a hack.

Seems like calcAlignedPlanarTE should be split into pbr/blinn-phong variants or LLMaterial::calcAlignedPlanarTE should be immplemented or calcAlignedPlanarTE should get a 'bool for_pbr' argument.

[Aqil-Ahmad]

Thanks for the feedback! Yes, I figured this might not be the right approach and wanted to get input on whether to implement a new one or modify the current calcAlignedPlanarTE()

working on it.