Transition costs only;)

[mclements]

Devin,

This is a fairly obvious pull request to allow for costs for specific transitions. I have included some test code.

The implementation uses hesim_bound() that is also included in my earlier pull request. Otherwise, there should not be any issues with overlaps between the two pull requests.

Again, I am happy to discuss the details.

Sincerely, Mark.

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Codecov Report

Attention: Patch coverage is 92.06349% with 5 lines in your changes missing coverage. Please review.

Project coverage is 92.82%. Comparing base (e218e24) to head (c1346c2). Report is 28 commits behind head on main.

Files with missing lines	Patch %	Lines
R/utils.R	86.66%	2 Missing :warning:
src/indiv-ctstm.cpp	92.59%	2 Missing :warning:
R/ctstm.R	90.00%	1 Missing :warning:

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #138      +/-   ##
==========================================
+ Coverage   92.51%   92.82%   +0.31%     
==========================================
  Files          64       64              
  Lines        5544     6273     +729     
==========================================
+ Hits         5129     5823     +694     
- Misses        415      450      +35     

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[mclements]

@dincerti Devin: this is now synced with main. Let me know if there is anything I can do to help. Sincerely, Mark.