Add cargo-rm (from cargo-edit) to cargo proper

[epage]

Problem

With #5586, users will have an "IDE-like experience" for adding dependencies but not removing them where they have to deal with updating feature tables, etc.

Proposed Solution

Merge cargo-rm

Notes

No response

[epage]

This will require

• An evaluation of prior art
• A re-evaluation of what the behavior should be
• Updates on behavior
• Port to cargo's code base in a merge-rm branch
• Actual merge PR

killercup/cargo-edit#682 is where I'm starting to organize thoughts on this.

[epage]

Blocked on #10581 so it can share test logic with cargo-add

[stshine]

Can we call this cargo remove instead of rm?

[tshepang]

am with @stshine... rm tripped me up a number of times

[epage]

Yes, most prior art uses remove (see the linked cargo-edit issue) though I expect we would provide an rm alias, whether visible or not.