Save output state for weak simulation and physics simulation

[thilomueller]

Description

This pull request adds an option get_state to the classes WeakSimParams and PhysicsSimParams which, if set to True, saves the resulting statevector in the attribute output_state. The implemented functionality is similar to StrongSimParams. Also, the docstring is updated and test cases are added to ensure the correct statevector is calculated and that this option is only available if a noise-free simulation is performed.

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 96.1%. Comparing base (eb1fa83) to head (6a822e4).
Report is 11 commits behind head on main.

Additional details and impacted files

@@          Coverage Diff          @@
##            main     #30   +/-   ##
=====================================
  Coverage   96.1%   96.1%           
=====================================
  Files         20      20           
  Lines       1772    1784   +12     
=====================================
+ Hits        1703    1716   +13     
+ Misses        69      68    -1     

Flag	Coverage Δ
python	96.1% <100.0%> (+0.1%)	⬆️

Files with missing lines	Coverage Δ
src/mqt/yaqs/circuits/circuit_tjm.py	97.2% <100.0%> (+<0.1%)	⬆️
...yaqs/core/data_structures/simulation_parameters.py	97.4% <100.0%> (+0.1%)	⬆️
src/mqt/yaqs/physics/physics_tjm.py	97.6% <100.0%> (+0.1%)	⬆️
src/mqt/yaqs/simulator.py	100.0% <100.0%> (+1.0%)	⬆️

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