1003 implement ode seir metapopulation model

[charlie0614]

Changes and Information

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

• implement a different mobility model without the graph approach and only using ODEs

Replacement for #1128

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

Merge Request - Guideline Checklist

Please check our git workflow. Use the draft feature if the Pull Request is not yet ready to review.

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 for new functionality has been added (Doxygen in the code and Markdown files if necessary)
• 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).

[codecov]

Codecov Report

Attention: Patch coverage is 98.74214% with 2 lines in your changes missing coverage. Please review.

Project coverage is 97.28%. Comparing base (3a0d789) to head (f788f7f).

Files with missing lines	Patch %	Lines
cpp/models/ode_seir_metapop/parameters.h	97.64%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1273      +/-   ##
==========================================
+ Coverage   97.27%   97.28%   +0.01%     
==========================================
  Files         171      173       +2     
  Lines       15117    15276     +159     
==========================================
+ Hits        14705    14862     +157     
- Misses        412      414       +2     

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[HenrZu]

licence header is missing?