parse cargo.toml to get a list of available features

[o0Ignition0o]

In order to enable the correct features for each subcrate, cargo-scout should be able to get a list of available features, and intersect with a list of enabled features to run clippy with the correct set (and not add any feature that is not available)

Examples:

Example 1

crate has a feature named bar
cargo-scout is invoked as cargo-scout --features "foo bar"

command run

clippy should be run with the bar feature only.

Example 2

crate is in a workspace, has first subcrate named foo, a second named bar, and both define a feature named baz.

command run

cargo scout is invoked ad cargo-scout is invoked as cargo-scout --features "baz"

Both clippy commands must add the feature baz.

command run

cargo-scout is invoked as cargo-scout --features "foo/baz"

the feature baz should only be added to the clippy check on subcrate foo.

[o0Ignition0o]

https://docs.rs/cargo_toml/0.8.0/cargo_toml/struct.Manifest.html can help a lot on finding out the features !