add a toggle to kub_net, as we are getting warnings currently

Signed-off-by: ahuston-0 <aliceghuston@gmail.com>

modules/kub_net.nix

@@ -1,5 +1,18 @@
 { lib, ... }:
 {
+  options = {
+    services.rad-dev.k3s-net = {
+      enable = lib.mkOption {
+        default = true;
+        example = true;
+        description = "Whether to enable k3s-net.";
+        type = lib.types.bool;
+      };
+    };
+  };
+
+  config = lib.mkIf {
+
     system.activationScripts.setZerotierName = lib.stringAfter [ "var" ] ''
       echo "ebe7fbd44565ba9d=ztkubnet" > /var/lib/zerotier-one/devicemap 
     '';
@@ -36,4 +49,5 @@
 
     # enable experimental networkd backend so networking doesnt break on hybrid systems
     networking.useNetworkd = true;
+  };
 }