🚨 Fix new warnings revealed by clang-tidy 18

[burgholzer]

Description

This PR aims to fix all the new warnings that were introduced in clang-tidy versions 18, which have been enabled with the switch to the mqt-workflows@v1.0.0.

The first commit, which will later be reverted, just triggers a full clang-tidy run on the whole codebase.

Checklist:

• The pull request only contains commits that are related to it.
• I have added appropriate tests and documentation.
• I have made sure that all CI jobs on GitHub pass.
• The pull request introduces no new warnings and follows the project's style guidelines.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.6%. Comparing base (015d0e6) to head (9d0da4e).
Report is 53 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##            main    #401     +/-   ##
=======================================
+ Coverage   96.3%   96.6%   +0.3%     
=======================================
  Files         35      35             
  Lines       1818    1817      -1     
  Branches     224     224             
=======================================
+ Hits        1751    1757      +6     
+ Misses        67      60      -7     

Flag	Coverage Δ
cpp	96.5% <100.0%> (+0.4%)	⬆️
python	97.2% <ø> (ø)

Files with missing lines	Coverage Δ
include/Configuration.hpp	0.0% <ø> (ø)
include/EquivalenceCheckingManager.hpp	100.0% <100.0%> (ø)
include/EquivalenceCriterion.hpp	88.8% <ø> (ø)
include/ThreadSafeQueue.hpp	95.0% <100.0%> (ø)
include/checker/EquivalenceChecker.hpp	100.0% <ø> (ø)
include/checker/dd/DDAlternatingChecker.hpp	100.0% <ø> (ø)
include/checker/dd/DDConstructionChecker.hpp	83.3% <ø> (ø)
include/checker/dd/DDEquivalenceChecker.hpp	100.0% <ø> (ø)
include/checker/dd/DDSimulationChecker.hpp	100.0% <ø> (ø)
include/checker/dd/TaskManager.hpp	98.5% <100.0%> (ø)
... and 18 more