Move Emacs from default.nix -> desktop.nix

Remove Alacritty, use Konsole instead since already configured for
Yakuake

system/home/default.nix

@@ -5,7 +5,6 @@
     inputs.nix-index-database.hmModules.nix-index
     inputs.plasma-manager.homeManagerModules.plasma-manager
     ./shell/default.nix
-    ./emacs/default.nix
     ./services/password-store/default.nix
     ./scripts/default.nix
   ];

system/home/desktop.nix

@@ -7,7 +7,7 @@
 {
   imports = [
     ./plasma/default.nix
-    ./alacritty/default.nix
+    ./emacs/default.nix
     ./browser/default.nix
     ./services/email/default.nix
   ];

system/home/plasma/default.nix

@@ -304,9 +304,8 @@
           {
             inherit AccentColor;
             LastUsedCustomAccentColor = AccentColor;
-            TerminalApplication = if config.programs.alacritty.enable then "alacritty" else "konsole";
-            TerminalService =
-              if config.programs.alacritty.enable then "Alacritty.desktop" else "org.kde.konsole.desktop";
+            TerminalApplication = "konsole";
+            TerminalService = "org.kde.konsole.desktop";
           };
         WM = {
           # TODO convert to base16 colours at some point