Fix bundling of DLLs on Windows

[alexdewar]

Solved using advice from here: https://stackoverflow.com/questions/10671916/how-to-copy-dll-files-into-the-same-folder-as-the-executable-using-cmake/69736197#69736197

Both local builds and the CI generated binaries now work.

I've also added steps to the CI to check that HealthGPS.Console will run with the --help flag, which should catch these sorts of problem in future.

I'm now hitting another error when actually running the program 😞 , but I'll open a separate issue for this.

Fixes #533.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 49.12%. Comparing base (9a6e7e3) to head (e25ece9).
Report is 7 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #534      +/-   ##
==========================================
+ Coverage   48.82%   49.12%   +0.30%     
==========================================
  Files         164      164              
  Lines        7779     7796      +17     
  Branches     1059     1063       +4     
==========================================
+ Hits         3798     3830      +32     
+ Misses       3972     3957      -15     
  Partials        9        9              

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[alexdewar]

Actually, I'll make a single PR for all the Windows-related fixes. Don't bother reviewing this.