Closes #19 🐔️👍️
Approved-by: aalbert <augustin.albert@bleu-azure.fr>
Approved-by: belazy <aarthuur01@gmail.com>
Approved-by: loutr <loutr@crans.org>

🦀️🍰🦀️🍰🦀️🍰

* chore(Cargo.toml): Add a missing space

* chore(ci): Remove unreachable line in coverage

* chore(cargo): Improve dependencies with workspace feature

* fix(ci): Tune coverage

* chore: Cleaning tests

* chore(kernel) : add coverage

* fix(kernel) : add coverage tests

* feat(errors): Improve errors handling

* chore(rust): Use of Deref/DerefMut for Environment

* chore(type_checker): Cleaning tests + Analyse branches

* chore(error): Add Result type + Improve use

* chore(location): Move location out of error file + Improve struct