Initialized components for add app resources and env groups to existing stacks

dashboard/src/main/home/cluster-dashboard/stacks/ExpandedStack/components/NewAppResource.tsx

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+import React from "react";
+
+const NewAppResource = () => {
+  return <div>NewAppResource</div>;
+};
+
+export default NewAppResource;

dashboard/src/main/home/cluster-dashboard/stacks/ExpandedStack/components/NewEnvGroup.tsx

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+import React from "react";
+
+const NewEnvGroup = () => {
+  return <div>NewEnvGroup</div>;
+};
+
+export default NewEnvGroup;