Expose chapter numbers when finding best chapter strategies

[Enkidu93]

Needed for sillsdev/serval#832

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This change is 

[ddaspit]

@ddaspit reviewed 6 of 6 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @Enkidu93)

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src/SIL.Machine/PunctuationAnalysis/Chapter.cs line 14 at r1 (raw file):

        }

        public List<Verse> Verses { get; private set; }

It isn't a big deal, but private set; isn't necessary if the property is only ever set during construction.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 72.60%. Comparing base (528dc72) to head (1a02940).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #369   +/-   ##
=======================================
  Coverage   72.60%   72.60%           
=======================================
  Files         423      423           
  Lines       35973    35975    +2     
  Branches     4965     4965           
=======================================
+ Hits        26117    26119    +2     
  Misses       8758     8758           
  Partials     1098     1098           

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