Add boxy theme
Add boxy theme

Add boxy now that https://github.com/evil-tim/boxy-zsh-theme/issues/1 is
closed.

Signed-off-by: Joe Block <13bb081c6ac072ef78a3e348068e2204400d7335@unixorn.net>

unixorn/awesome-zsh-plugins,voronkovich/awesome-zsh-plugins