Add warning when attempting to remove dependency from workspace root

[jxom]

Summary

This PR addresses issue #5611.

This PR basically adds a warning when trying to remove a dependency from a workspace root. When specifying the -W/--ignore-workspace-root-check it will remove the dependency from the workspace root.

Test plan

Before:

❯ yarn remove left-pad
yarn remove v1.6.0
[1/2] Removing module left-pad...
[2/2] Regenerating lockfile and installing missing dependencies...
success Uninstalled packages.

After:

❯ yarn-local remove left-pad
yarn remove v1.6.0
error Running this command will remove the dependency from the workspace root rather than the workspace itself, which might not be what you want - if you really meant it, make it explicit by running this command again with the -W flag (or --ignore-workspace-root-check).
info Visit https://yarnpkg.com/en/docs/cli/remove for documentation about this command.

❯ yarn-local remove left-pad -W
yarn remove v1.6.0
[1/2] 🗑  Removing module left-pad...
[2/2] 📃  Regenerating lockfile and installing missing dependencies...
success Uninstalled packages.

[arcanis]

Sounds good to me - thanks!