docs: fix WebXR build setup commands

[arussell-nvidia]

Summary

• update WebXR SDK setup commands to use the repository-root scripts
• use the package.json dependency through the standard npm install flow

Validation

• git diff --check
• confirmed both referenced scripts exist and package.json points to the downloaded local SDK package

Summary by CodeRabbit

• Documentation
  • Updated WebXR build instructions to use local setup scripts for configuring the CloudXR.js environment and downloading the SDK.
  • Simplified dependency installation instructions to use npm install with the locally downloaded package.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Enterprise

Run ID: 30ce45c1-22f2-48c1-a68a-31a04ef7339e

📥 Commits

Reviewing files that changed from the base of the PR and between 1ac164c and 4dfa35c.

📒 Files selected for processing (1)

• docs/source/getting_started/build_from_source/webxr.rst

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📝 Walkthrough

Walkthrough

The WebXR build documentation now instructs developers to run the CloudXR environment setup and SDK download scripts, placing the SDK in deps/cloudxr/. Dependency installation now uses npm install from the WebXR client directory instead of referencing a versioned SDK tarball.

Estimated code review effort: 1 (Trivial) | ~2 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly summarizes the documentation update to the WebXR build setup commands.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch codex/webxr-doc-paths-20260730

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