add syncthing and strawberry; add virtiofsd to virtualisation

configuration/modules/virtualisation.nix

@@ -1,4 +1,4 @@
-{ ... }:
+{ pkgs, ... }:
 
 {
   virtualisation = {
@@ -8,6 +8,7 @@
     };
     libvirtd = {
       enable = true;
+      qemu.vhostUserPackages = [ pkgs.virtiofsd ];
     };
     # remember to add the necessary users to the podman group
     podman = {