Use xr-session.mjs script from the engine

[willeastcott]

No description provided.

[Copilot]

Pull Request Overview

This PR updates multiple HTML example files to use the xr-session.mjs script from the PlayCanvas engine's node_modules directory instead of a local copy, and removes the local implementation of the script.

• Replaced local assets/scripts/xr-session.mjs references with engine version from ../node_modules/playcanvas/scripts/esm/xr-session.mjs
• Removed the local xr-session.mjs file entirely
• Cleaned up id attributes from some pc-asset elements in the text3d.html file

Reviewed Changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
text3d.html	Updated asset references and removed unnecessary id attributes
splat.html	Changed xr-session script source to use engine version
shoe-configurator.html	Changed xr-session script source to use engine version
positional-sound.html	Changed xr-session script source to use engine version
physics.html	Changed xr-session script source to use engine version
glb.html	Changed xr-session script source to use engine version
car-configurator.html	Changed xr-session script source to use engine version
basic-shapes.html	Changed xr-session script source to use engine version
examples/assets/scripts/xr-session.mjs	Removed local implementation of xr-session script
annotations.html	Changed xr-session script source to use engine version
animation.html	Changed xr-session script source to use engine version

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}