Revert "Switch framework to KDE"

This reverts commit ad8fdfc93c.

framework/configuration.nix

@@ -85,7 +85,7 @@
     xserver = {
       enable = true;
       displayManager.gdm.enable = true;
-      desktopManager.plasma5.enable = true;
+      desktopManager.gnome.enable = true;
     };
 
     syncthing = {
@@ -130,12 +130,31 @@
 
   security.pam.services.login.fprintAuth = true;
 
-  environment.systemPackages = with pkgs; [
+  environment = {
+    gnome.excludePackages = (with pkgs; [
+      gnome-console
+      gnome-photos
+      gnome-tour
+    ]) ++ (with pkgs.gnome; [
+      atomix          # puzzle game
+      cheese          # webcam
+      epiphany        # web browser
+      geary           # email reader
+      gnome-calendar
+      gnome-music
+      hitori          # sudoku game
+      iagno           # go game
+      tali            # poker game
+      totem           # video player
+    ]);
+
+    systemPackages = with pkgs; [
       gnome.adwaita-icon-theme
       ifuse
       libimobiledevice
       libheif
     ];
+  };
 
   programs.steam = {
     enable = true;