getCalendar gets provider-wide calendar metadata. Use it for title, timezone,
location, owner, conference support, and default behavior; use getCalendarListEntry
for the connected user’s display and subscription settings.
Example
Inputs
calendar?: string accepts an exact visible title or ID and defaults to
"primary". account optionally selects the Google account.
Output
ReturnsSignal<Calendar> with id, summary, optional description,
location, timeZone, dataOwner, accessRole, colors, list visibility,
selection and deletion flags, primary, autoAcceptInvitations,
conferenceSolutionTypes, defaultReminders, notifications, and optional
summaryOverride. List-only fields use neutral defaults when the provider’s
calendar resource does not supply them.