Closes #9893

Fixes #10484
Closes #10481

Fixes #10520

Closes #9396

This is an improvement (in my opinion) to the `brews` command that prints each leaf formula (in white), followed by its dependencies (in blue), on each line. Compared to the existing flat list of formulae, the new layout is both more compact and more informative, by differentiating leaves from dependencies at a glance.

Screenshot:
<img width="530" src="https://user-images.githubusercontent.com/1753319/130641713-b78535c9-e3f5-4dbb-80f8-22bc00e1129d.png">

* feat(rvm): add alias `rvms`

* docs(rvm): new alias `rvms`

* Added support for SUSE and derivatives for command-not-found plugin

* Updated command-not-found documentation to list support for SUSE and derivatives

* Add plugin for istioctl completion. close #10405

* fix typo

* Update README.md

For Volta JavaScript toolchain
https://github.com/volta-cli/volta

Closes #9463

Fixes fb86ec77

Co-authored-by: K Harishankar <48408097+Haritronic909@users.noreply.github.com>

Fixes #10505

Closes #10474
Co-authored-by: Tom Payne <twpayne@gmail.com>

BREAKING CHANGE: the `DEFAULT_PROXY` setting has been renamed to `SHELLPROXY_URL`,
and `CONFIG_PROXY` has been renamed to `SHELLPROXY_CONFIG`. See the plugin README
for more information.
Co-authored-by: Marc Cornellà <hello@mcornella.com>

Closes #5992

Closes #2177
Closes #6197
Co-authored-by: Henrik Ravn <hravnx@gmail.com>