feat(k8s): declare 'talos' modules

modules/k8s/crossplane.nix

@@ -1,11 +1,6 @@
 { config, lib, ... }:
 
 {
-  options.k8s.crossplane.enable = lib.mkOption {
-    default = false;
-    type = lib.types.bool;
-  };
-
   config = lib.mkIf config.k8s.crossplane.enable {
     nixpkgs.allowedUnfree = [ "upbound" ];
   };