fd8507ae04
since support for kbd elements was added with explicit intent in #175128 it seems like a good idea to support this in nixos-render-docs instead of just dropping it in favor of `*F12*` etc. since it's a very rare thing in the manual and purely presentational it makes sense to use bracketed spans instead of a new myst role. the html-elements.lua plugin is now somewhat misnamed, but it'll go away very soon so we don't want to bother renaming it.
*** NixOS *** NixOS is a Linux distribution based on the purely functional package management system Nix. More information can be found at https://nixos.org/nixos and in the manual in doc/manual.