Add TryGetChapters to ScriptureRangeParser

[pmachapman]

Fixes #486

I noticed that the ScriptureRangeParser was not in a namespace, so set the namespace to SIL.Machine.Scripture. If it was not an oversight, I can revert it to remain in the SIL.Machine namespace.

I also took the opportunity to update the unit tests to use new .Net 10 language features.

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This change is 

[codecov-commenter]

Codecov Report

❌ Patch coverage is 93.82716% with 10 lines in your changes missing coverage. Please review.
✅ Project coverage is 73.53%. Comparing base (418ff22) to head (170f122).

Files with missing lines	Patch %	Lines
src/SIL.Machine/Scripture/ScriptureRangeParser.cs	94.83%	5 Missing and 3 partials ⚠️
src/SIL.Machine/Corpora/UsxFileTextCorpus.cs	0.00%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #497   +/-   ##
=======================================
  Coverage   73.52%   73.53%           
=======================================
  Files         451      451           
  Lines       37697    37708   +11     
  Branches     5183     5183           
=======================================
+ Hits        27718    27728   +10     
- Misses       8841     8842    +1     
  Partials     1138     1138           

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[Enkidu93]

@Enkidu93 reviewed 5 files and all commit messages, and made 1 comment.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on ddaspit).