nixos/wordpress: Add language support

[onny]

Description of changes

Fixes #75598

Example usage

{ pkgs, ... }: let

  language-de = pkgs.stdenv.mkDerivation {
    name = "language-de";
    src = pkgs.fetchurl {
      url = "https://de.wordpress.org/wordpress-6.0.1-de_DE.tar.gz";
      sha256 = "sha256-dlas0rXTSV4JAl8f/UyMbig57yURRYRhTMtJwF9g8h0=";
    };
    installPhase = "mkdir -p $out; cp -r ./wp-content/languages/* $out/";
  };

in {

  services.httpd.adminAddr = "hello@example.org";

  services.wordpress.sites."localhost" = {
    enable = true;
    languages = [ language-de ];
    extraConfig = ''
      # Wordpress will be in German from the start on, no need to
      # set in manually
      define ('WPLANG', 'de_DE');
    '';
  };

}

Missing

• Test it
• Release notes
• Tests
• Note where to get available languages
• Add documentation to NIxOS Wiki Wordpress article

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandbox = true set in nix.conf? (See Nix manual)
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 22.11 Release Notes (or backporting 22.05 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
  • (Release notes changes) Ran nixos/doc/manual/md-to-db.sh to update generated release notes
• Fits CONTRIBUTING.md.

[onny]

@ofborg eval

[onny]

Hey, I really would be happy to have this feature integrated. Already using it with a few Wordpress installations on my NixOS servers and it works as intended. Usage is also described on the NixOS wiki https://nixos.wiki/wiki/Wordpress

[onny]

Okay done :)