Add captain autocomplete command

[Jaymon]

Add captain autocomplete command that will create autocomplete rules for all scripts found in the current directory

some resources that will help:

• https://blog.bouzekri.net/2017-01-28-custom-bash-autocomplete-script.html
• https://www.gnu.org/software/bash/manual/html_node/Programmable-Completion-Builtins.html
• https://unix.stackexchange.com/questions/1800/how-to-specify-a-custom-autocomplete-for-specific-commands
• https://superuser.com/questions/289539/custom-bash-tab-completion
• https://unix.stackexchange.com/questions/400345/how-to-customize-bash-autocomplete-to-list-the-files-in-another-directory
• https://unix.stackexchange.com/questions/11906/how-to-change-the-target-directory-for-tab-completion?rq=1