Simpler bash completion

[lyderic]

To add just completion to bash, the easiest is to add the following line in ~/.bashrc:

source <(just --completions bash)

No need to fiddle with completions scripts in /etc/bash_completion.d or whatever, which can vary according to linux distribution and might need to be updated at every new just version.

To be complete, these are the lines I use to also have completion for the 'j' alias:

alias j=just
source <(just --completions bash)
complete -F _just -o bashdefault -o default j

Maybe this is worth adding to the documentation in:
https://just.systems/man/en/chapter_63.html

Please note I have tested this only on bash, my bash version is:
GNU bash, version 5.1.16(1)-release (x86_64-pc-linux-gnu)

[casey]

Yeah, good point, this should definitely be in the readme.