ENH: CoordinateImage API

[effigies]

Along with #1084, replaces #1056.

Starting with some basic implementations in test directory. Next step is to write some API unit tests to clarify expected behavior and code some specific implementations toward those tests.

Will close #1056 once I've taken all comments into account.

[pep8speaks]

Hello @effigies, Thank you for updating!

• In the file nibabel/cifti2/cifti2.py:

Line 34:1: F811 redefinition of unused 'Recoder' from line 33
Line 35:1: F811 redefinition of unused 'warn' from line 22

To test for issues locally, pip install flake8 and then run flake8 nibabel.

Comment last updated at 2022-08-31 00:48:00 UTC

[codecov]

Codecov Report

Patch coverage: 58.07% and project coverage change: -0.83% ⚠️

Comparison is base (4e7ad07) 92.19% compared to head (6c2407d) 91.36%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1090      +/-   ##
==========================================
- Coverage   92.19%   91.36%   -0.83%     
==========================================
  Files          99      101       +2     
  Lines       12458    12734     +276     
  Branches     2560     2621      +61     
==========================================
+ Hits        11486    11635     +149     
- Misses        648      762     +114     
- Partials      324      337      +13     

Files Changed	Coverage Δ
nibabel/coordimage.py	36.60% <36.60%> (ø)
nibabel/cifti2/caretspec.py	58.19% <58.19%> (ø)
nibabel/arrayproxy.py	100.00% <100.00%> (ø)
nibabel/gifti/gifti.py	93.26% <100.00%> (ø)
nibabel/pointset.py	99.16% <100.00%> (+0.38%)	⬆️
nibabel/xmlutils.py	89.74% <100.00%> (+8.34%)	⬆️

... and 4 files with indirect coverage changes

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