CMake: as a library vs. as devevelopment

[the-moisrex]

Currently the project's cmake is written for myself and those who want to develop the project itself and not those who want to use this project.

For users of this library:

• [ ] No printing stuff in CMake
• [ ] Removing the dependencies, but giving the utilities for the users to import them if they choose to
• [ ] No debug additional compiler flags
• [ ] no CMAKE_EXPORT_COMPILE_COMMANDS
• [ ] No cmake CXX Standard version
• [ ] No changing the output/include/... directories
• [ ] #389