Motion Sample: drop 'not dynamically validated' from the footer

Motion Sample: load the full-res mesh directly, drop progressive LOD

Motion Sample: drop the LeRobot dataset variant

Motion Sample: progressive mesh loading, per-clip lighting, smoother follow cam

Move teleop pages into teleopSample/; gzip-pack the Master mesh; per-clip default camera

3-up tile grid on landing page; new Motion Sample cover (jogging w/ joint frames)

Add Motion Sample viewer (FF Master, 31 DoF, PHC-format refs)