plasma5 -> plasma6

for both the NixOS desktop env as well as home-manager packages.

ktouch had to be disabled due to being marked as broken, let's fix this
later

common/default.nix

@@ -153,7 +153,7 @@ in
 
   # Enable the KDE Desktop Environment.
   services.displayManager.sddm.enable = true;
-  services.xserver.desktopManager.plasma5.enable = true;
+  services.desktopManager.plasma6.enable = true;
 
   # dconf required for several Gnome applications
   programs.dconf.enable = true;

common/packages.nix

@@ -44,53 +44,13 @@
     ethtool
     trace-cmd
 
-      plasma5Packages.kdeGear.akonadi-mime # for KOrganizer
-    ]
-    ++ (
-      with plasma5Packages;
-      with kdeGear;
-      [
-        #akonadi
-        #akonadi-calendar
-        #akonadi-contacts
-        #akonadi-import-wizard
-        #akonadi-mime
-        #akonadi-notes
-        #akonadi-search
-        #akonadiconsole
-        #akregator
-        #kaddressbook
-        #kalarm
-        #kalarmcal
-        #kcalutils
-        #kcontacts
-        #kdav
-        #kdepim-addons
-
-        #kdepim-runtime
-        #kidentitymanagement
-        #kldap
-        #kmail
-        #kmailtransport
-        #kmbox
-        #kmime
-        #kontact
-        #kontactinterface
-        #korganizer
-        #kpimtextedit
-        #libkdepim
-        #libksieve
-        #mailcommon
-        #messagelib
-        #pimcommon
-        #pim-sieve-editor
-
-        # for some Flatpak packkages
-        accountsservice
-      ]
-    );
     # NetworkManager stuff
     networkmanager-openconnect
     networkmanager-vpnc
     networkmanager-openvpn
+    # TODO: is this still necessary?
+    kdePackages.akonadi-mime # for KOrganizer
+    # for some Flatpak packkages
+    accountsservice
+  ];
 }