Add wireshark config

hosts/common/optional/wireshark.nix

@@ -0,0 +1,9 @@
+{
+  programs.wireshark = {
+    enable = true;
+    dumpcap.enable = true;
+    usbmon.enable = true;
+  };
+
+  users.users.julian.extraGroups = ["wireshark"];
+}