⚡ dedicated unitary simulator DD package config

[burgholzer]

Description

This PR adds a dedicated DD package configuration for the unitary simulator in DDSim that is fine-tuned for the respective requirements.

Related to cda-tum/mqt-ddsim#182

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 92.1%. Comparing base (cd2e767) to head (f128b60).
Report is 97 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##            main    #691     +/-   ##
=======================================
- Coverage   92.1%   92.1%   -0.1%     
=======================================
  Files        125     125             
  Lines      13790   13761     -29     
  Branches    2154    2151      -3     
=======================================
- Hits       12704   12675     -29     
  Misses      1086    1086             

Flag	Coverage Δ
cpp	91.8% <ø> (-0.1%)	⬇️
python	99.7% <ø> (ø)

Files with missing lines	Coverage Δ
include/mqt-core/dd/Package.hpp	97.0% <ø> (ø)
src/dd/FunctionalityConstruction.cpp	90.9% <ø> (-4.3%)	⬇️