reparent example files properly

[rozyczko]

Standardized the definition of PATH_STATIC in all test files to use os.path.dirname(__file__) or os.path.dirname(os.path.dirname(__file__)), so the path to the _static directory is correctly resolved relative to each test file rather than relying on the package location.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.57%. Comparing base (c8bc2a2) to head (585d4ac).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #420   +/-   ##
========================================
  Coverage    94.57%   94.57%           
========================================
  Files           54       54           
  Lines         5516     5516           
========================================
  Hits          5217     5217           
  Misses         299      299           

Flag	Coverage Δ
integration	38.37% <ø> (ø)
unittests	94.57% <ø> (ø)

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