Make some methods private

[h-mayorquin]

@CodyCBakerPhD

These are methods that we don't want to make guarantee and we also don't believe should be on the API docs. I am making them private. We can change them if the needs come to be.

[CodyCBakerPhD]

Note that though this marks them as private, they are all still publically exposed to the submodules

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.40%. Comparing base (905dc73) to head (cfebd14).
Report is 69 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1050      +/-   ##
==========================================
- Coverage   90.42%   90.40%   -0.02%     
==========================================
  Files         129      129              
  Lines        7924     7924              
==========================================
- Hits         7165     7164       -1     
- Misses        759      760       +1     

Flag	Coverage Δ
unittests	90.40% <100.00%> (-0.02%)	⬇️

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

Files with missing lines	Coverage Δ
src/neuroconv/basedatainterface.py	94.44% <100.00%> (ø)
...aces/behavior/neuralynx/neuralynx_nvt_interface.py	98.33% <100.00%> (ø)
...tainterfaces/ecephys/mearec/mearecdatainterface.py	100.00% <100.00%> (ø)
src/neuroconv/nwbconverter.py	94.81% <100.00%> (ø)
src/neuroconv/tools/roiextractors/__init__.py	100.00% <ø> (ø)
src/neuroconv/tools/roiextractors/roiextractors.py	82.18% <100.00%> (ø)
...c/neuroconv/tools/testing/data_interface_mixins.py	95.33% <100.00%> (ø)
src/neuroconv/utils/__init__.py	50.00% <ø> (ø)
src/neuroconv/utils/dict.py	93.97% <100.00%> (ø)
src/neuroconv/utils/json_schema.py	96.87% <100.00%> (ø)

... and 1 file with indirect coverage changes