cleanup command

**Is your feature request related to a problem? Please describe.**
There does not seem to be way to install all old version of packages.

**Describe the solution you'd like**
A command like `asdf uninstall --not-global` that would remove all version of packages not specifiied in global `.tool-versions`.

Start at the proposed `asdf uninstall --not-global` command and inspect how the global `.tool-versions` file identifies versions to keep. Done means the command removes every installed package version not specified there, while preserving all globally specified versions; verify the behavior across supported tools.

Written by the indexing model from the issue text.