Refactor out live view only example

[nv-jakob]

Description

Fixes #(issue)

Type of change

• New feature (non-breaking change which adds functionality)
• Documentation update

Testing

Checklist

• I have read and understood the contribution guidelines
• I have run the linter and formatter with SKIP=check-copyright-year pre-commit run --all-files
• I have made corresponding changes to the documentation
• I have added tests that prove my fix/feature works (or explained why not)
• I have signed off all my commits (git commit -s) per the DCO

Summary by CodeRabbit

• New Features
  • Added a new live DeviceIO browser example that shows hands, head, controllers, and full-body tracking together in real time.
  • Included a new example build target so the live view ships when examples are enabled.
• Documentation
  • Updated the DeviceIO recording/replay docs to point to the new live visualization example.

[coderabbitai]

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📥 Commits

Reviewing files that changed from the base of the PR and between 83103b0 and 9595188.

📒 Files selected for processing (6)

• CMakeLists.txt
• docs/source/references/mcap_record_replay.rst
• examples/deviceio_live_view/CMakeLists.txt
• examples/deviceio_live_view/python/deviceio_viser.py
• examples/deviceio_live_view/python/live_deviceio.py
• examples/deviceio_live_view/python/pyproject.toml

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📝 Walkthrough

Walkthrough

This PR adds a new example, examples/deviceio_live_view, integrated into the CMake build and documented in the MCAP record/replay reference. It introduces a Python module (deviceio_viser.py) that builds a combined human-tracking pipeline (hands, head, controllers, full body) and renders each tracker via viser-backed visualization classes. A runnable script (live_deviceio.py) drives a CloudXR/TeleopSession loop, feeding tracking results into the visualization and printing periodic status. A pyproject.toml defines packaging and dependencies for the example.

Estimated code review effort: 3 (Moderate) | ~25 minutes

Sequence Diagram(s)

sequenceDiagram
  participant Script as live_deviceio.main
  participant Launcher as CloudXRLauncher
  participant Session as TeleopSession
  participant Viz as HumanDeviceIOViz
  participant Server as viser.ViserServer

  Script->>Launcher: launch_context()
  Script->>Session: create(TeleopSessionConfig)
  loop every frame
    Script->>Session: step()
    Session-->>Script: result
    Script->>Viz: update(result)
    Viz->>Server: update point clouds/segments/visibility
  end
  Script->>Script: KeyboardInterrupt breaks loop

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🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 25.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title matches the main change: extracting a dedicated live-view-only example.
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.

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