VolumetricImagingExtractor

[pauladkisson]

Fixes #245

See also discussion in #241

[CodyCBakerPhD]

I will recruit @alessandratrapani to help review this PR as well - maybe we'll go over it at the retreat?

[alessandratrapani]

Looks good to me, just a minor correction

[codecov]

Codecov Report

Merging #248 (60e89ca) into main (e8d84bc) will increase coverage by 0.56%.
Report is 1 commits behind head on main.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #248      +/-   ##
==========================================
+ Coverage   76.98%   77.55%   +0.56%     
==========================================
  Files          37       38       +1     
  Lines        2724     2793      +69     
==========================================
+ Hits         2097     2166      +69     
  Misses        627      627              

Flag	Coverage Δ
unittests	77.55% <100.00%> (+0.56%)	⬆️

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Files	Coverage Δ
src/roiextractors/extractorlist.py	100.00% <100.00%> (ø)
src/roiextractors/testing.py	99.31% <100.00%> (+<0.01%)	⬆️
src/roiextractors/volumetricimagingextractor.py	100.00% <100.00%> (ø)