Make codept as a library (2/n)

[dinosaure]

This is more of a maintenance issue but when reading the code, the programming style is not really consistent. I don't really have strong opinions on this but have you thought about using something like ocamlformat or ocp-indent?

[Octachron]

Applying more consistently ocp-indent could be a sensible cleanup. I am overall not really convinced by ocamlformat, at least for small projects.