[Rust] Cargo merge

Hi everyone,

I just wanted to share with you the fact that I published a small Rust crate called Cargo merge that allows to merge your crate files into a single output file, that you can then easily upload to solve your favorite CodinGame puzzles and challenges.

You can install it by running : cargo install cargo-merge, and use it by running cargo merge anywhere in your package.

I hope that it will help some, and if you have any feedback, don’t hesitate, here, or by creating an issue in the repository.

Happy Coding !