materusPC: add webp support

configurations/host/materusPC/kde.nix

@@ -52,9 +52,10 @@ in
     #Fix for amdgpu crashes
     KWIN_DRM_USE_MODIFIERS = "0";
     KWIN_DRM_NO_DIRECT_SCANOUT = "1";
+    QT_PLUGIN_PATH = [ "${pkgs.qt6.qtimageformats}/${pkgs.qt6.qtbase.qtPluginPrefix}" ];
   };
   environment.systemPackages = with pkgs; [
-        kdePackages.ark
+    kdePackages.ark
   ];
 
   materus.profile.steam.extraPkgs = [ pkgs.kdePackages.breeze pkgs.kdePackages.breeze-gtk pkgs.kdePackages.dolphin ];

configurations/host/materusPC/tmp.nix

@@ -213,7 +213,11 @@
     aspellDicts.en-computers
     steamtinkerlaunch
     distrobox
+    # WebP support
+    libwebp
+    webp-pixbuf-loader
 
+    # Compression
     p7zip
     unrar
     bzip2