[58040] Added support for event metadata

[mrashed-dev]

Description

The Nylas Calendar API has a new beta feature of adding a new metadata field to calendar events. This PR makes the feature available via the Nylas Node.js SDK.

Usage

Adding a metadata object is simple. Add the object under the metadata key when creating an event:

const event = nylas.events.build({
  title: 'New Years Party!',
  calendarId: CALENDAR_ID,
  when: { start_time: 1546290000, end_time: 1546300800 },
  participants: [{ email: 'swag@nylas.com', name: 'My Nylas Friend' }],
  location: 'My House!',
  metadata: {
      'event_type': 'gathering'
  }
});

License

I confirm that this contribution is made under the terms of the MIT license and that I have the authority necessary to make this contribution on behalf of its copyright owner.

[shortcut-integration]

This pull request has been linked to Clubhouse Story #58040: Node SDK - add support for event metadata (Wix).

[mrashed-dev]

Testing was complete using an event (created with metadata) via both the API and via the SDK as well. Events can be created with metadata within the SDK and the SDK can also read metadata successfully.