feat: detect instance variables generated with @property-functions

[lukarade]

Closes #272

Summary of Changes

Added the detection of instance variables generated with @property-functions.

[github-actions]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ PYTHON	black	5	0	0	1.89s
✅ PYTHON	mypy	5		0	3.21s
✅ PYTHON	ruff	5	0	0	0.06s
✅ REPOSITORY	git_diff	yes		no	0.06s

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.94%. Comparing base (c451179) to head (4270093).
Report is 22 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #281      +/-   ##
==========================================
- Coverage   92.98%   92.94%   -0.04%     
==========================================
  Files          98       98              
  Lines        6813     6818       +5     
==========================================
+ Hits         6335     6337       +2     
- Misses        478      481       +3     

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