ENH: Port GIFTI/CIFTI interfaces from fMRIPrep

[mgxd]

Bring in interfaces introduced in nipreps/fmriprep#3011

[codecov-commenter]

Codecov Report

Patch coverage: 75.57% and project coverage change: +0.46 🎉

Comparison is base (c2d46e1) 62.31% compared to head (3b570d0) 62.78%.

❗ Current head 3b570d0 differs from pull request most recent head f4ac201. Consider uploading reports for the commit f4ac201 to get more accurate results

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #811      +/-   ##
==========================================
+ Coverage   62.31%   62.78%   +0.46%     
==========================================
  Files          50       52       +2     
  Lines        5987     6204     +217     
  Branches      887      910      +23     
==========================================
+ Hits         3731     3895     +164     
- Misses       2074     2122      +48     
- Partials      182      187       +5     

Flag	Coverage Δ
reportlettests	∅ <ø> (∅)
unittests	∅ <ø> (∅)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
niworkflows/utils/bids.py	76.19% <ø> (ø)
niworkflows/interfaces/surf.py	47.00% <41.66%> (-0.47%)	⬇️
niworkflows/interfaces/workbench.py	77.24% <77.24%> (ø)
niworkflows/interfaces/conftest.py	96.15% <96.15%> (ø)

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[effigies]

Honestly skimmed over the workbench; given that you gave it a thorough read-through after I wrote it, I'm comfortable with it as long as you just copied. If you made any changes you want reviewed, could you highlight them?

Made some suggestions to improve the documentation in the Python GIFTI interface.

[mgxd]

Nope, no changes

[effigies]

Cool. Since all changes just merged are in docstrings or comments, I will merge without wasting CI cycles.