[ENH] change verbosity levels

[Remi-Gau]

• add basic filter function to transformers
• start implementing more flexible verbosity

[codecov]

Codecov Report

Merging #507 (0b968be) into dev (418b16a) will decrease coverage by 0.46%.
The diff coverage is 82.69%.

@@            Coverage Diff             @@
##              dev     #507      +/-   ##
==========================================
- Coverage   73.02%   72.56%   -0.47%     
==========================================
  Files         192      192              
  Lines        4060     4086      +26     
==========================================
  Hits         2965     2965              
- Misses       1095     1121      +26     

Flag	Coverage Δ
unittests	72.56% <82.69%> (-0.47%)	⬇️

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

Impacted Files	Coverage Δ
src/workflows/roi/bidsCreateROI.m	0.00% <ø> (ø)
src/bids_model/applyTransformersToEventsTsv.m	83.63% <79.54%> (-3.04%)	⬇️
src/IO/loadAndCheckOptions.m	91.66% <100.00%> (ø)
src/defaults/checkOptions.m	90.58% <100.00%> (ø)
src/messages/errorHandling.m	100.00% <100.00%> (ø)
src/messages/isTtest.m	100.00% <100.00%> (ø)
src/messages/notImplemented.m	100.00% <100.00%> (ø)
src/messages/printCredits.m	16.66% <100.00%> (-83.34%)	⬇️
src/messages/printToScreen.m	50.00% <100.00%> (-50.00%)	⬇️
... and 1 more

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