Add model grouping to device registry

[rickwierenga]

Summary

• add validated model objects with per-model support statuses to device registry entries
• render searchable model names across the first three table columns, with status badges aligned beneath device support
• let each model-bearing device row reveal its models through a compact chevron, with a bulk Show models toggle
• automatically reveal matching models when search narrows to 10 or fewer device families and count searchable models in the prompt
• consolidate the Masterflex model note and the Thermoshake, ALPS, Cytomat, PreciseFlex, STAR/STARlet, Ultraseal, and BioShake families
• limit the Cytation 1 capability listing to microscopy
• update affected guide cards and document the registry schema and model browsing behavior

Testing

• .venv/bin/python -m pytest docs/_exts/plr_devices/registry_tests.py (29 passed)
• .venv/bin/python -m ruff check docs/_exts/plr_devices/data.py docs/_exts/plr_devices/html.py docs/_exts/plr_devices/registry_tests.py
• warning-as-error Sphinx builds of the machine table and all affected guide pages

[rickwierenga]

scaling the device registry since we have too many different models now ...