Draft: [Long Task] Clean cyclic dependencies

There are multiple cyclic dependencies in the code of the type:

• folderA/lib1 depends on folderB/lib2
• folderB/libX depends on folderA/libY

This can be observed with Codevis for example. This sort of thing:

And this doesn't even account for the src/* (or new src/base/*) files.

The idea is to get the code cleaned and more modular eventually. Those cyclic dependencies break the ability to use shared libraries for example, which hinders part of !24 (merged).