add story for interaction editor (#903)

packages/perseus-editor/src/widgets/__stories__/interaction-editor.stories.tsx

@@ -0,0 +1,24 @@
+import {ApiOptions} from "@khanacademy/perseus";
+import {action} from "@storybook/addon-actions";
+import * as React from "react";
+
+import InteractionEditor from "../interaction-editor";
+
+type StoryArgs = Record<any, any>;
+
+type Story = {
+    title: string;
+};
+
+export default {
+    title: "Perseus/Editor/Widgets/Interaction Editor",
+} as Story;
+
+export const Default = (args: StoryArgs): React.ReactElement => {
+    return (
+        <InteractionEditor
+            onChange={action("onChange")}
+            apiOptions={ApiOptions.defaults}
+        />
+    );
+};