[Desktop/Plasma] Move plasma-specific conf into a dedicated file

desktop/plasma.nix

@@ -0,0 +1,59 @@
+{config, pkgs, lib, ...}:
+with lib;
+let
+    cfg = config.aviallon.desktop;
+in {
+  config = mkIf cfg.enable {
+    # Enable the Plasma 5 Desktop Environment.
+    services.xserver.desktopManager.plasma5 = {
+      enable = true;
+      runUsingSystemd = true;
+      useQtScaling = true;
+      supportDDC = true;
+    };
+
+    systemd.tmpfiles.rules = mkAfter [
+      "e ${config.users.users.sddm.home}/.cache/sddm-greeter/qmlcache/ - - - 0"
+      "x ${config.users.users.sddm.home}/.cache"
+    ];
+
+    # Prevents blinking cursor
+    services.xserver.displayManager.sddm = {
+      enable = true;
+      settings = {
+        Theme = {
+          CursorTheme = "breeze_cursors";
+        };
+        X11 = {
+          MinimumVT = mkOverride 50 1;
+        };
+      };
+    };
+
+    environment.systemPackages = with pkgs; with libsForQt5; [
+      skanlite
+      packagekit-qt
+      discover
+      akonadi
+      kmail
+      korganizer
+      dolphin
+      kio-fuse
+      konsole
+      kate
+      yakuake
+      pinentry-qt
+      plasma-pa
+      ark
+    ];
+
+    xdg.portal = {
+      enable = mkDefault true;      
+      gtkUsePortal = mkDefault true;
+      extraPortals = with pkgs; [
+        xdg-desktop-portal-gtk
+      ];
+    };
+
+  };
+}