In the README:
- Revise the top-level and Setup sections to reflect OpenXR support.
- Update existing headset setup instructions to cover both OpenXR and OpenVR setups, with OpenXR being enabled by default. Added a note at the end of the section explaining how to enable OpenVR support.
- Add new sections for "Hololens 2" and "Meta Quest" headsets
- Add entries for "Supported headsets" and "Supported XR modality" to each headset section
- Add "How to use hand interaction" section
- Update the Contributors section to acknowledge @LucasGandel and @sankhesh.

In the DeveloperGuide:
- Remove obsolete build instructions.
- Update Python snippet.
- Add references to the documentation of associated VTK modules.
- Add the "Mapping of Controller Action to VTK event" section.