Redesign CMAKE with individual CMAKE files for subfolders

[mknaranja]

In a future version, we should think of a redesign of our CMAKE with individual CMAKE files for subfolders

          Using GLOB can cause issues when changing or adding files. CMake files  are usually recursive (ex. https://gitlab.com/CLIUtils/modern-cmake/-/tree/master/examples/extended-project)

Originally posted by @ds-aakash in #65 (comment)

[mknaranja]

Done in #57