Create a Conan recipe for Unity Test

[klimkin]

Conan is one of the most popular package manager for C/C++.
conan-io/conan-center-index#18013

[daltonv]

I'd second this and would consider making a PR myself. One difficulty though will be the helper scripts like generate_test_runner.rb. They could be packaged as a binary exe in the conan package, but would still require a hidden (at least to conan) dependency on ruby.

That's workable, but I wonder if there is a better solution? Maybe cmake scripts for the scripts, but then we force a build system on users.