Function singleton

apps/webapp/app/utils/singleton.ts:1–6

(name: string, getValue: () => T)

export function singleton<T>(name: string, getValue: () => T): T {
  const thusly = globalThis as any;
  thusly.__trigger_singletons ??= {};
  thusly.__trigger_singletons[name] ??= getValue();
  return thusly.__trigger_singletons[name];
}