quickAddEvent asks Google Calendar to interpret a short natural-language
description. Use it for human-authored convenience input; use createEvent for
deterministic schedules and structured fields.
Example
Inputs
text: string is required. calendar?: string defaults to primary and
account selects the Google account. All fields accept compatible signals.
Output
Returns Google’s parsedCalendarEvent; see Get event. Parsing follows the selected account’s Calendar locale and timezone and can be ambiguous, so inspect the returned start and end before using them for high-stakes scheduling.