[home] Create explicit kubectl role

This allows work machines to enable development, while not including
non-work-related kubectl management stuffs.

home/home-laptop-compact.nix

@@ -17,6 +17,7 @@
     kdeconnect.enable = true;
     media.enable = true;
     sync.enable = true;
+    kubectl.enable = true;
     # office.enable = false;  # Excluded for storage constraints
   };