feat: Check that the state is clean after check

[statnmap]

=> Il faut mettre à jour la branche de cette PR pour pouvoir la poursuivre

tags: feat, doc, test

Why?

• CRAN does not like when you let some files after the check

What?

• Check that there is no new file after tests, examples, vignettes or full check

fix issue #13

[ArthurData]

New PR : #50