Should `cargo upgrade` operate on crate or dependency names?

`cargo add` and `cargo rm` both use dependency names. `cargo upgrade` used to also use dependencies names but in the current pass I switched to crate names to be more like `cargo update` but I think that is likely unneeded consistency.

Using dependency names would allow for better filtering of what you want upgraded (though `--pinned` helps)

Start by comparing the naming behavior of `cargo add`, `cargo rm`, `cargo upgrade`, and `cargo update`, including how `--pinned` affects filtering. Determine whether `cargo upgrade` should accept dependency names or crate names, then document the chosen behavior and its completion criteria.

Written by the indexing model from the issue text.