Add ImageInterface

[h-mayorquin]

Should close #1186.

[bendichter]

why would you need to indicate the number of images?

[h-mayorquin]

We don't as far as I see. I uncritically accepted this from cline I think.

[h-mayorquin]

Changed, I also added the correct headers on the rst that you mentioned.

[h-mayorquin]

Ben mentioned that a better place for this might be the conversion gallery and I think he is right.

[h-mayorquin]

I moved it.

[codecov]

Codecov Report

Attention: Patch coverage is 90.51724% with 11 lines in your changes missing coverage. Please review.

Project coverage is 89.73%. Comparing base (89aac67) to head (d087e15).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...c/neuroconv/datainterfaces/image/imageinterface.py	90.26%	11 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1190      +/-   ##
==========================================
+ Coverage   89.65%   89.73%   +0.08%     
==========================================
  Files         129      131       +2     
  Lines        8378     8536     +158     
==========================================
+ Hits         7511     7660     +149     
- Misses        867      876       +9     

Flag	Coverage Δ
unittests	89.73% <90.51%> (+0.08%)	⬆️

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

Files with missing lines	Coverage Δ
src/neuroconv/datainterfaces/__init__.py	100.00% <100.00%> (ø)
src/neuroconv/datainterfaces/image/__init__.py	100.00% <100.00%> (ø)
...c/neuroconv/datainterfaces/image/imageinterface.py	90.26% <90.26%> (ø)

... and 1 file with indirect coverage changes