message: Add i18nInit hook event for v9.242
  Closes
diff: @@ -436,6 +436,13 @@ declare global {
  slot: number
  ) => boolean | void;
  + /**
  + * A hook event that fires once Localization translations have been loaded and are ready for use.
  + * @remarks This is called by {@link Hooks.callAll}.
  + * @see {@link Localization#initialize}
  + */
  + i18nInit: () => void;
  +
  /**
  * A hook event that fires as Foundry is initializing, right before any initialization tasks have begun.
  * @remarks This is called by {@link Hooks.callAll}.
  