Refactor kustomize config command structure

- Create cfg, fn, live parent commands

cmd/config/ext/ext.go

@@ -5,12 +5,10 @@ package ext
 
 import (
 	"path/filepath"
-
-	"sigs.k8s.io/kustomize/kyaml/krmfile"
 )
 
 // GetOpenAPIFile returns the path to the file containing supplementary OpenAPI definitions.
 // Maybe be overridden to configure which file to read OpenAPI definitions from.
 var GetOpenAPIFile = func(args []string) (string, error) {
-	return filepath.Join(args[0], krmfile.KrmfileName), nil
+	return filepath.Join(args[0], "Krmfile"), nil
 }