Set up CI

[carrascomj]

Hi!

I noticed there is not Continuous Integration for this one. Let me know if a PR (github actions I suppose) for that would be interesting.

[ztlpn]

Yes, that would be a welcome addition!

[carrascomj]

Cool! I'll submit one workflow with the starter pack clippy, fmt, build and test.

I also saw that you have the same README as in the docs, so it could be automatically generated with cargo-readme like in this one (the examples in github's would be always valid), but let's just go with CI for now.

[ztlpn]

Yeah, I've considered using cargo-readme, but ultimately decided against it because I wanted the README and the frontpage of the docs be a bit different.

[carrascomj]

Right, it's not always the best fit for every project. It also may be an overkill for only one example in the README.

Still, at least for now, it seems like the README.md here just have additions with respect to the one from lib.rs, so something like this README.tlp could be used in this case (it is used by cargo-readme by defautl). If you are planning to make them more different it won't work, of course.