This PR adds contrib scripts for bash and zsh completion. Simply call: ```bash source contrib/autocompletion/bash_autocomplete ``` or for Zsh: ```bash source contrib/autocompletion/zsh_autocomplete ``` Signed-off-by: Andrew Thornton <art27@cantab.net> --------- Signed-off-by: Andrew Thornton <art27@cantab.net> Co-authored-by: a1012112796 <1012112796@qq.com> Co-authored-by: techknowlogick <techknowlogick@gitea.io>