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

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

@@ -0,0 +1,18 @@
+import type { ApiModel, ApiItem } from '@microsoft/api-extractor-model';
+import type { DocBlock } from '@microsoft/tsdoc';
+import { createCommentNode } from '.';
+import { blockTag, type DocBlockTagJSON } from './CommentBlockTag';
+import { type AnyDocNodeJSON, type DocNodeJSON, node } from './CommentNode';
+
+export interface DocBlockJSON extends DocNodeJSON {
+	content: AnyDocNodeJSON[];
+	tag: DocBlockTagJSON;
+}
+
+export function block(block: DocBlock, model: ApiModel, version: string, parentItem?: ApiItem) {
+	return {
+		...node(block),
+		content: block.content.nodes.map((node) => createCommentNode(node, model, version, parentItem)),
+		tag: blockTag(block.blockTag),
+	};
+}