Generalize some CLAUDE.neuro-dms.md to generalize common principles over BIDS...

I wanted smth which would summarize and point to

- STAMPED principles + STAMPED skill(s)
- [BIDS common principles](https://bids-specification.readthedocs.io/en/stable/common-principles.html#tabular-files)
- additional WiP BIDS things (so similar to what OSA Assistant by @neuromechanist) aggregates already (https://github.com/OpenScience-Collective/osa/blob/main/src/assistants/bids/config.yaml)
- @yarikoptic's favorite WiP/motivational issues/proposals as what to do if "not covered by BIDS yet"
- https://github.com/bids-standard/bids-specification/issues/2283
- https://github.com/bids-standard/bids-specification/issues/2273
- ...
- to use DataLad and thus DataLad "skill" (e.g. by @bcmcpher https://github.com/bcmcpher/my-skills/tree/main/plugins/datalad-cli)
- ...

Start by reading CLAUDE.neuro-dms.md, then compare its current principles with the linked STAMPED, BIDS common-principles, OSA Assistant config.yaml, DataLad skill, and BIDS issue references. Done means a generalized document clearly points to and summarizes the requested common principles, skills, and relevant work-in-progress guidance.

Written by the indexing model from the issue text.