Missing DomeLight texture support

[bbias]

Problem

DomeLight is missing support for the inputs:texture:file attribute, which is essential for environment lighting using HDRI textures.

Missing Attribute

• inputs:texture:file (asset) - Specifies the texture file path for environment lighting

Current Behavior

• DomeLight texture attribute is not parsed
• Environment lighting setups lose their texture references
• Dome lights cannot reference HDRI files properly

Expected Behavior

• inputs:texture:file should be parsed and stored
• Proper support for environment lighting workflows
• Compatibility with standard USD dome light setups

Impact

Environment lighting workflows are broken as dome lights cannot reference their texture files, limiting the ability to use HDRI-based lighting in USD scenes.

[syoyo]

PR has been merged. I think this issue is ready to close.