gnome-terminal: Add audibleBell option

[sestrella]

Description

Turn on/off the terminal's bell. A small video showcasing how the audible-bell key controls the terminal's bell:

Checklist

• Change is backwards compatible.

• Code formatted with ./format.

• Code tested through nix-shell --pure tests -A run.all.

• Test cases updated/added. See example.

• Commit messages are formatted like

  {component}: {description}
  
  {long description}
  

[sestrella]

@rycee since donf stores all keys in a single binary file it was not possible to write a simple assertion over a file. I tried to call dconf read instead without too much luck, I didn't commit the test itself since it is not working but here is what I have so far:

{ config, lib, pkgs, ... }:

let
  profileId = "6a6bc359-397f-41e1-9e84-61f23994f89f";
in {
  config = {
    home.packages = [
      pkgs.dconf
    ];

    programs.gnome-terminal = {
      enable = true;
      profile = {
        "${profileId}" = {
          default = true;
          visibleName = "test";
          audibleBell = false;
        };
      };
    };

    nmt.script = ''
      audibleBell=$(HOME=/tmp $TESTED/home-path/bin/dconf read /org/gnome/terminal/legacy/profiles:/:${profileId}/audible-bell)
      [ $audibleBell == "false" ] || fail "Expected false, got $audibleBell"
    '';
  };
}

[rycee]

Thanks for trying to create a test. It's no problem that its missing in this case due to the difficulty to test dconf stuff. If/when we fix that then we can revisit the testing of this.