Arabic translation of title template, headings, labels

[cicirello]

Summary

Add Arabic (ar) translations of title template, headings, labels, etc for locale code ar.

Potential Contributors
See Contributing a Translation section of the README for step-by-step instructions.

Please don't edit the README with the new locale code, despite the Pull Request template requesting that documentation is updated. Changes to the README automatically go live in the GitHub Marketplace listing for the action. I'll take care of updating README with the new locale code in the list of locales when I create the release that contains it to ensure that documentation is consistent with latest release.

[Po-rygon]

Hello, wondering if you could assign this issue to me for hacktoberfest.

[cicirello]

@rhyd0n hello. I just assigned you.

[alfawal]

Can you assign me this issue? for Hacktoberfest.

[cicirello]

@alfawal There is already someone assigned.