Replace exa with eza

[howeme]

arch replaced exa with eza, a community fork, because the former wasn't being maintained.

[url]https://archlinux.org/packages/extra/x86_64/eza/[/url]
[url]https://archlinuxarm.org/packages/aarch64/exa[/url]

[url]https://github.com/ogham/exa/issues/1243[/url]
[url]https://github.com/eza-community/eza[/url]