[FIX] extract tests

[Remi-Gau]

• add some of the tests data from pybids
• extract tests from pacakge

[codecov]

Codecov Report

Attention: Patch coverage is 83.33333% with 1 line in your changes missing coverage. Please review.

Project coverage is 83.30%. Comparing base (7d5a3b9) to head (9f04aae).
Report is 33 commits behind head on main.

Files with missing lines	Patch %	Lines
bids/ext/reports/report.py	83.33%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #107      +/-   ##
==========================================
- Coverage   86.69%   83.30%   -3.39%     
==========================================
  Files          15        9       -6     
  Lines         744      575     -169     
==========================================
- Hits          645      479     -166     
+ Misses         99       96       -3     

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