Add the script to weechat repository

[Ekleog]

It would be great to be able to just /script install the script, and given last commit was 4 months ago I think it's not too much “in development” for updates to the script to be painful to send.

See https://weechat.org/scripts/add/ ; I think it's just a matter of filling in a form 😀

Thanks for your work!