Bring outputs up to date with BEPs 11, 12, 17, and 38

[tsalo]

Changes proposed in this pull request

• Replace "atlas" entity with "seg" entity in parcellated data. Proposed in BEP 017 and seg is present in BIDS already. I'm still not sold on having both "atlas" and "seg" in BIDS, but "seg" at least is in there.
  • I've retained "atlas" for the actual atlas files.
• Swap order of space and atlas entities in atlas files, since atlas was removed from BIDS in [SCHEMA][ENH] Remove atlas entity and replace it with seg in prep of BEP038 bids-standard/bids-specification#1579, so the old order is no longer required.
• Rename connectivity matrices in TSV format from conmat to relmat. Proposed in BEP 017.
• Rename connectivity matrices in CIFTI format from conmat to boldmap. Proposed in BEP 012.
• Replace measure entity with stat. Currently planned in BEP 017.
• Replace alff, reho, and coverage suffixes with stat-<alff|reho|coverage>_bold[map], based on BEP 012. Closes Rename ALFF and ReHo outputs based on BEP 012 #971.
• Add metadata to relmat files dictated by BEP 017.
  • I didn't add "Code" because I don't think it makes sense to include it.
• Change extension for desc-linc_qc files from csv to tsv.

References

• BEP 011: Structural derivatives
• BEP 012: Functional derivatives
• BEP 017: Relationship and connectivity matrix data
• BEP 038: Atlases

Documentation that should be reviewed

[codecov]

Codecov Report

Attention: Patch coverage is 98.07692% with 1 line in your changes missing coverage. Please review.

Project coverage is 82.44%. Comparing base (3563e9e) to head (b7537aa).
Report is 109 commits behind head on main.

Files with missing lines	Patch %	Lines
xcp_d/utils/bids.py	96.29%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1065      +/-   ##
==========================================
+ Coverage   82.29%   82.44%   +0.15%     
==========================================
  Files          48       48              
  Lines        5897     5925      +28     
  Branches      803      812       +9     
==========================================
+ Hits         4853     4885      +32     
+ Misses        844      841       -3     
+ Partials      200      199       -1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[tsalo]

@mattcieslak @kahinimehta would you mind taking a look at the new filenames some time next week to see if they align with your understanding to the relevant BEPs?

[mattcieslak]

I like these BEPs a lot. The new output names I think make sense and are more technically correct than before. Awesome work