feat: add util package for generating search indices (#8571)

packages/api-extractor-utils/src/tsdoc/CommentNodeContainer.ts

@@ -0,0 +1,20 @@
+import type { ApiItem, ApiModel } from '@microsoft/api-extractor-model';
+import type { DocNodeContainer } from '@microsoft/tsdoc';
+import { createCommentNode } from '.';
+import { type AnyDocNodeJSON, type DocNodeJSON, node } from './CommentNode';
+
+export interface DocNodeContainerJSON extends DocNodeJSON {
+	nodes: AnyDocNodeJSON[];
+}
+
+export function nodeContainer(
+	container: DocNodeContainer,
+	model: ApiModel,
+	version: string,
+	parentItem?: ApiItem,
+): DocNodeContainerJSON {
+	return {
+		...node(container),
+		nodes: container.nodes.map((node) => createCommentNode(node, model, version, parentItem)),
+	};
+}