Support shell completions

[Freed-Wu]

Description

If you're suggesting a new feature then just a description will suffice.

• Does this issue still occur in the master branch? (Required if issue)

❯ neofetch --<TAB>
option
--ascii_bold         Whether or not to bold the ascii logo.
--ascii_colors       x x x x x x  Colors to print the ascii art
--ascii_distro       Which Distro's ascii art to print
--ascii              Shortcut to use 'ascii' backend.
--backend            Which image backend to use.
--bar_border         Whether or not to surround the bar with '()'
--bar_char           'elapsed char' 'total char'
--bar_colors         num num        Colors to make the bar.
--bar_length         Length in spaces to make the bars.
...

[Freed-Wu]

Looks like this project's maintainer is inactive: #2288
Now zsh-users/zsh-completions#996 have fixed this issue.
And if this project includes this script, it will be deleted in https://github.com/zsh-users/zsh-completions