Install ruby commands on Windows

[Voldivh]

🦟 Bug fix

Fixes #28

Summary

Make sure to add_subdirectory(cmd) on Windows. This requires generating the .rb and .yaml files to folders unique to $<CONFIG>.

Checklist

• Signed all commits for DCO
• Added tests
• Updated documentation (as needed)
• Updated migration guide (as needed)
• Consider updating Python bindings (if the library has them)
• codecheck passed (See contributing)
• All tests passed (See test coverage)
• While waiting for a review on your PR, please help review another open pull request to support the maintainers

Note to maintainers: Remember to use Squash-Merge and edit the commit message to match the pull request summary while retaining Signed-off-by messages.

[codecov]

Codecov Report

Merging #402 (e1371fc) into gz-msgs10 (edd9632) will not change coverage.
The diff coverage is n/a.

❗ Current head e1371fc differs from pull request most recent head 3d92998. Consider uploading reports for the commit 3d92998 to get more accurate results

@@            Coverage Diff             @@
##           gz-msgs10     #402   +/-   ##
==========================================
  Coverage      97.26%   97.26%           
==========================================
  Files             27       27           
  Lines           1172     1172           
==========================================
  Hits            1140     1140           
  Misses            32       32