i3: add pulseaudio package as requirement and fix default terminal

modules/home/i3/default.nix

@@ -43,6 +43,7 @@ in
     home.packages = with pkgs; [
       nitrogen
       xfce.xfce4-screenshooter
+      pulseaudio # For pactl commands
     ];
     xsession.enable = true; # Give gui programs access to sessionVariables
     # Prevent screen from going blank (check these settings with `xset q`)

modules/home/i3/i3/config

@@ -29,7 +29,7 @@ bindsym XF86AudioMicMute exec --no-startup-id pactl set-source-mute @DEFAULT_SOU
 floating_modifier $mod
 
 # start a terminal
-bindsym $mod+Return exec alacritty
+bindsym $mod+Return exec $TERMINAL
 
 # kill focused window
 bindsym $mod+Shift+q kill