Adds DicomImage class in medimage namespace that inherits from MedicalImage to implement deidentify extra

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Codecov Report

Attention: Patch coverage is 58.94737% with 39 lines in your changes missing coverage. Please review.

Project coverage is 83.13%. Comparing base (cc63714) to head (43038ec).
Report is 6 commits behind head on main.

Files with missing lines	Patch %	Lines
extras/fileformats/extras/medimage/dicom.py	27.77%	26 Missing ⚠️
extras/fileformats/extras/medimage/base.py	50.00%	7 Missing ⚠️
fileformats/medimage/base.py	80.00%	2 Missing ⚠️
fileformats/medimage/dicom.py	85.71%	2 Missing ⚠️
extras/fileformats/extras/medimage/raw.py	50.00%	1 Missing ⚠️
fileformats/medimage/raw/pet/base.py	91.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #36      +/-   ##
==========================================
- Coverage   86.36%   83.13%   -3.24%     
==========================================
  Files          31       32       +1     
  Lines         748      824      +76     
==========================================
+ Hits          646      685      +39     
- Misses        102      139      +37     

Flag	Coverage Δ
	83.13% <58.94%> (-3.24%)	⬇️

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