tari-dev: Add fish completions for httpie
tari-dev: Add fish completions for httpie

Since the community package doesn't include the fish completions found
upstream, we install them here instead. There is already a bug report
about the fish completions, and when it eventually gets fixed, these
steps can be removed from the PKGBUILD.

Bug report: https://bugs.archlinux.org/task/55786

GloverDonovan/new-start