added branching for early stop

[xavierr]

We add the possibility to pass via the hook a function that can stop earlier the simulation.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 40.00000% with 9 lines in your changes are missing coverage. Please review.

Project coverage is 43.88%. Comparing base (7b84168) to head (df2a078).

Files	Patch %	Lines
src/simulator/simulator.jl	40.00%	9 Missing :warning:

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Additional details and impacted files

@@            Coverage Diff             @@
##             main      #60      +/-   ##
==========================================
- Coverage   43.89%   43.88%   -0.01%     
==========================================
  Files         129      129              
  Lines       14023    14037      +14     
==========================================
+ Hits         6155     6160       +5     
- Misses       7868     7877       +9     

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