Add parsing for adobe splat meta fields in PLYs

[spsDrop]

This PR adds support for reading the up_axis, chirality, safe_orbit_camera_elevation_min_max_radians, and safe_orbit_camera_radius_min header values and applies them if the active camera is a ArcRotateCamera.

[bjsplat]

Please make sure to label your PR with "bug", "new feature" or "breaking change" label(s).
To prevent this PR from going to the changelog marked it with the "skip changelog" label.

[bjsplat]

Please make sure to label your PR with "bug", "new feature" or "breaking change" label(s).
To prevent this PR from going to the changelog marked it with the "skip changelog" label.

[bjsplat]

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[spsDrop]

I can't seem to add a label to this PR now that it's created. But it's a new feature

[bjsplat]

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[sebavan]

@CedricGuillemet can you review the latest commit ?