Bikeshed a better way to parse cli arguments

[o0Ignition0o]

We're slowly adding more and more options to cargo-scout, and it might be a bit hard to remember them all.

clippy is doing something interesting in their arguments parsing by splitting arguments until they hit -- and change the arguments purpose.

Maybe we can try to bikeshed something like that:

parse the presence (or not) of +nightly (cargo option).
parse until the first -- and make it VCS arguments (git options).
parse until the second -- and make it Project arguments (cargo toml options)
parse until the end and make it Linter arguments (clippy options)

We could even take out the last given argument as a working directory/current_dir path.

Would that be a better overall and more generic approach to linters and options ?