1321 copy constructable simulation

[MaxBetzDLR]

Changes and Information

Please briefly list the changes (main added features, changed items, or corrected bugs) made:

• Move handling of IntegratorCore outside of Simulation class into member pointer integrator
• Change IntegratorCore to be unique in integrator
• Add Copy Const/Assignmen

If need be, add additional information and what the reviewer should look out for in particular:

Merge Request - Guideline Checklist

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Checks by code author

• Every addressed issue is linked (use the "Closes #ISSUE" keyword below)
• New code adheres to coding guidelines
• No large data files have been added (files should in sum not exceed 100 KB, avoid PDFs, Word docs, etc.)
• Tests are added for new functionality and a local test run was successful (with and without OpenMP)
• Appropriate documentation within the code (Doxygen) for new functionality has been added in the code
• Appropriate external documentation (ReadTheDocs) for new functionality has been added to the online documentation
• Proper attention to licenses, especially no new third-party software with conflicting license has been added
• (For ABM development) Checked benchmark results and ran and posted a local test above from before and after development to ensure performance is monitored.

Checks by code reviewer(s)

• Corresponding issue(s) is/are linked and addressed
• Code is clean of development artifacts (no deactivated or commented code lines, no debugging printouts, etc.)
• Appropriate unit tests have been added, CI passes, code coverage and performance is acceptable (did not decrease)
• No large data files added in the whole history of commits(files should in sum not exceed 100 KB, avoid PDFs, Word docs, etc.)
• On merge, add 2-5 lines with the changes (main added features, changed items, or corrected bugs) to the merge-commit-message. This can be taken from the briefly-list-the-changes above (best case) or the separate commit messages (worst case).

Closes #1321

[MaxBetzDLR]

We moved to pybind11v3.0.0 for better handling of unique_ptr. As a follow up, #1347 should look at future proofing the usage of pybind11.

[codecov]

Codecov Report

❌ Patch coverage is 83.67347% with 8 lines in your changes missing coverage. Please review.
✅ Project coverage is 97.27%. Comparing base (2defe8b) to head (e587e64).
⚠️ Report is 11 commits behind head on main.

Files with missing lines	Patch %	Lines
cpp/memilio/math/adapt_rk.h	0.00%	2 Missing ⚠️
cpp/memilio/math/euler.h	0.00%	2 Missing ⚠️
cpp/memilio/math/euler_maruyama.h	0.00%	2 Missing ⚠️
cpp/memilio/math/stepper_wrapper.h	50.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1345      +/-   ##
==========================================
- Coverage   97.37%   97.27%   -0.11%     
==========================================
  Files         174      174              
  Lines       15024    15126     +102     
==========================================
+ Hits        14630    14714      +84     
- Misses        394      412      +18     

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[reneSchm]

Thanks for making simulations copyable! I have some requests, but mostly clean-up

[reneSchm]

Looks good, thanks for your work!