Check, how to restructure project

[s-martin]

God example: https://github.com/Barthelemy/CppProjectTemplate

[s-martin]

Or use the pitchfork structure:

https://github.com/vector-of-bool/pitchfork
https://www.reddit.com/r/cpp/comments/996q8o/prepare_thy_pitchforks_a_de_facto_standard/