feat: community workshop for custom widgets and CSS (#5984)

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>

apps/docs/src/lib/utils.ts

@@ -0,0 +1,11 @@
+import type { ClassValue } from "clsx";
+import { clsx } from "clsx";
+import { twMerge } from "tailwind-merge";
+
+export function cn(...inputs: ClassValue[]) {
+  return twMerge(clsx(inputs));
+}
+
+export function errorMessage(caught: unknown, fallback: string) {
+  return caught instanceof Error ? caught.message : fallback;
+}