Refresh Codeberg documentatation looks by using Halfmoon v2.
Mobile UI also got a overhaul.
Reviewed-on: https://codeberg.org/Codeberg/Documentation/pulls/655
Reviewed-by: Bastian Greshake Tzovaras <gedankenstuecke@noreply.codeberg.org>
Reviewed-by: Otto <otto@codeberg.org>
Co-authored-by: Gusted <postmaster@gusted.xyz>
Co-committed-by: Gusted <postmaster@gusted.xyz>
