feat: Sync to OSS repo

packages/core/src/utils/memo.ts

@@ -0,0 +1,18 @@
+export function memo<T>(fn: () => T, cleanup?: (input: T) => Promise<void>) {
+	let value: T | undefined;
+	let loaded = false;
+
+	const result = (): T => {
+		if (loaded) return value as T;
+		loaded = true;
+		value = fn();
+		return value as T;
+	};
+	result.reset = async () => {
+		if (cleanup && value) await cleanup(value);
+		loaded = false;
+		value = undefined;
+	};
+
+	return result;
+}