BEP038: Atlas examples

[effigies]

This branch implements examples according to bids-standard/bids-specification#1714 (rendered: https://bids-specification--1714.org.readthedocs.build/en/1714/).

Please make PRs against the bep038 branch, and we will merge this PR as a part of merging BEP038.

[effigies]

@oesteban Notes on atlas-suit:

• atlas-*_description.json does not currently have a file rule. From reading the BEP, it looks like it can occur at any level of the hierarchy, which is not possible with the current structure of file rules. Is it problematic to require it to be found at the dataset root?
• *_dseg.tsv need to be non-empty files.
• *_stat-confidence_* - The stat entity is not defined.

Otherwise, this needs very little adjustment to the validator.

[oesteban]

• atlas-*_description.json does not currently have a file rule. From reading the BEP, it looks like it can occur at any level of the hierarchy, which is not possible with the current structure of file rules. Is it problematic to require it to be found at the dataset root?

I don't think this should be a problem.

• *_dseg.tsv need to be non-empty files.

Gotcha, will give them content.

• *_stat-confidence_* - The stat entity is not defined.

desc then?

[effigies]

• *_stat-confidence_* - The stat entity is not defined.

desc then?

Sounds good to me.