examples(lerobot): package under isaacteleop_examples

[jiwenc-nv]

Description

Part of #985. Stacked on #1042.

No flat sibling imports here — the three scripts are independent — but the example had no pyproject.toml, so its dependencies amounted to a README line saying pip install lerobot with nothing declaring the rest. This moves it to the layout in examples/README.md so it installs and runs like every other example.

uv pip install -e ./examples/lerobot      # add [viz] for the rerun viewer
python -m isaacteleop_examples.lerobot.record

The dist deliberately does not claim a bare top-level lerobot — it would land in site-packages beside the real one. rerun-sdk is a viz extra, since only visualize needs it.

One inconsistency fixed in passing. record.py wrote its dataset next to __file__ while visualize.py and analyze.py read local_datasets/ from the working directory — the three only agreed when run from the example directory. record.py now uses the working directory too, which is also the only choice that survives installation.

The README also notes that the SO-101 example the docs reference lives in the LeRobot repo, not here — an easy thing to go looking for in the wrong place.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update

Testing

x86_64 / Ubuntu, Python 3.12. Wheel ships the three modules under isaacteleop_examples/lerobot/ with no namespace __init__.py. pre-commit clean.

Not covered: recording needs a headset and a lerobot install. No references to this example exist anywhere else in the repo, so the blast radius is the example itself.

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

_{No tests: this is a move, and this example has no automated coverage.}

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[ivany-nv]

Same as #1038: Path(__file__).parent -> Path.cwd() / "local_datasets/..." is right for an installed copy, but examples/lerobot/.gitignore: local_datasets/ only covers the example directory, and the README says to run from the repo root:

$ git check-ignore -v local_datasets/x
(not ignored)

Needs a root .gitignore entry.