feat(examples): bare minimum "light switch" example

[zachwaite]

This example application is a bare minimum example of the core functionality. Persistence is not enabled, nor is logging, nor any kind of user interface. It just starts, runs some commands, queries the final state and prints it.

It models a "light switch". You can "install" the switch, then turn it "off" or "on" using commands. You can issue a query to get the current state of a switch.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.26%. Comparing base (2c91b45) to head (8ae5395).
Report is 18 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #322      +/-   ##
==========================================
- Coverage   84.89%   84.26%   -0.63%     
==========================================
  Files          15       14       -1     
  Lines        1225     1157      -68     
==========================================
- Hits         1040      975      -65     
+ Misses        185      182       -3     

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[ar3s3ru]

Hi @zachwaite, thanks a lot for your PR! Neat idea 😄

As you may see I haven't been updating the crate in some time (life got in the way 😅) and I notice that there are some linting errors from clippy related to dependency versions.

I'll see if I can fix them in the next few days, and review the code properly.

Thank you again for your time and effort 🙏🏻

[zachwaite]

@ar3s3ru No expectations from me about updates. I'm also willing to do more work on getting the checks to pass, but wasn't sure you were interested in contributions. Since it seems like you are, I'll take another pass.

The syn dependency is probably out of my wheelhouse and personally don't mind just writing out the boilerplate (4 trait impls IIRC) vs using the aggregate_root macro. Food for thought.

Thanks for replying to my PR!

[ar3s3ru]

Hi @zachwaite, I seem to have fixed the issues in #323 -- would you mind rebasing the PR?

[ar3s3ru]

Thanks again for the PR! Left a couple of small comments 📝

[ar3s3ru]

Thank you for your contribution once again @zachwaite, may your light switches always work 💡