Add transform offsets for files in DisplayData

[blairlyons]

Use Case

As a user visualizing agents with either mesh or PDB files, I want to be able to control how the mesh or PDB files are scaled and translated relative to each agent instance's transform so that I can accurately visualize geometry files without having to manually edit them first.

Acceptance Criteria

Users can provide additional data in DisplayData:

• meshScale - additional scaling to use for mesh files
• pdbOffset - a translation to apply for PDB files

Details

QUESTION: Do we want to make this more generic, maybe use fileScale and fileOffset and apply the transform to any type of geometry file?