Support QToolBar in iface.addToolBar

[Joonalai]

This PR:

• Adds possibility to use QToolBar as an argument in iface.addToolBar method
• Fixes pre-commit environment

Fixes #19.

[Joonalai]

The test fail with latest QGIS because of this line (which makes it possible to rearrange layers) https://github.com/GispoCoding/pytest-qgis/blob/main/src/pytest_qgis/pytest_qgis.py#L342

[codecov-commenter]

Codecov Report

Merging #23 (5f751f6) into main (7f17044) will increase coverage by 0.39%.
The diff coverage is 77.77%.

@@            Coverage Diff             @@
##             main      #23      +/-   ##
==========================================
+ Coverage   54.09%   54.48%   +0.39%     
==========================================
  Files           7        7              
  Lines         464      468       +4     
==========================================
+ Hits          251      255       +4     
  Misses        213      213              

Flag	Coverage Δ
pytest	54.48% <77.77%> (+0.39%)	⬆️

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Impacted Files	Coverage Δ
src/pytest_qgis/qgis_interface.py	44.00% <77.77%> (+2.33%)	⬆️

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