feat(website): Add utility for resolving summaries for json items (#8734)

apps/website/src/util/summary.ts

@@ -0,0 +1,47 @@
+import type {
+	ApiItemJSON,
+	DocNodeJSON,
+	DocCodeSpanJSON,
+	DocPlainTextJSON,
+	DocNodeContainerJSON,
+} from '@discordjs/api-extractor-utils';
+
+export function tryResolveDescription(member: ApiItemJSON) {
+	const { summary } = member!;
+
+	if (!summary) {
+		return undefined;
+	}
+
+	let retVal = '';
+
+	function recurseNodes(node: DocNodeJSON) {
+		switch (node.kind) {
+			case 'CodeSpan':
+				retVal += (node as DocCodeSpanJSON).code;
+				break;
+			case 'PlainText':
+				retVal += (node as DocPlainTextJSON).text;
+				break;
+			case 'Section':
+			case 'Paragraph':
+				for (const currentNode of (node as DocNodeContainerJSON).nodes) {
+					recurseNodes(currentNode);
+				}
+
+				break;
+			default:
+				break;
+		}
+	}
+
+	for (const node of summary.nodes) {
+		recurseNodes(node);
+	}
+
+	if (retVal === '') {
+		return null;
+	}
+
+	return retVal;
+}