feat: Covariance transport for dense propagation

[andiwand]

WIP

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 55.10204% with 44 lines in your changes missing coverage. Please review.

Project coverage is 48.97%. Comparing base (5893004) to head (d258138). Report is 380 commits behind head on main.

:exclamation: Current head d258138 differs from pull request most recent head 862d739

Please upload reports for the commit 862d739 to get more accurate results.

Files	Patch %	Lines
...agator/detail/GenericDenseEnvironmentExtension.hpp	54.54%	1 Missing and 19 partials :warning:
Core/src/Propagator/detail/CovarianceEngine.cpp	38.88%	0 Missing and 11 partials :warning:
Core/include/Acts/Propagator/EigenStepper.ipp	69.23%	0 Missing and 4 partials :warning:
...Acts/Propagator/detail/GenericDefaultExtension.hpp	50.00%	1 Missing and 2 partials :warning:
Core/src/Propagator/StraightLineStepper.cpp	70.00%	0 Missing and 3 partials :warning:
...nclude/Acts/Propagator/detail/LoopStepperUtils.hpp	60.00%	1 Missing and 1 partial :warning:
...e/include/Acts/Propagator/StepperExtensionList.hpp	50.00%	0 Missing and 1 partial :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2869      +/-   ##
==========================================
+ Coverage   48.89%   48.97%   +0.08%     
==========================================
  Files         488      489       +1     
  Lines       28253    28368     +115     
  Branches    13307    13371      +64     
==========================================
+ Hits        13813    13893      +80     
+ Misses       4827     4820       -7     
- Partials     9613     9655      +42     

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.