Added Events and Sessions endpoints. Enhancements to support registration fields.

Released Events and Sessions endpoints


## Added

New **Basic** APIs:

- `GET /v2/zoom_events/events`
- `POST /v2/zoom_events/events`
- `GET /v2/zoom_events/events/{eventId}`
- `PATCH /v2/zoom_events/events/{eventId}`
- `DELETE /v2/zoom_events/events/{eventId}`

New **Sessions** APIs:

- `GET /v2/zoom_events/events/{eventId}/sessions`
- `POST /v2/zoom_events/events/{eventId}/sessions`
- `GET /v2/zoom_events/events/{eventId}/sessions/{sessionId}`
- `PATCH /v2/zoom_events/events/{eventId}/sessions/{sessionId}`
- `DELETE /v2/zoom_events/events/{eventId}/sessions/{sessionId}`
- `GET /v2/zoom_events/events/{eventId}/sessions/{sessionId}/join_token`

New **Tickets** APIs:

- `DELETE /v2/zoom_events/events/{eventId}/tickets/{ticketId}`

## Enhancements

Support for registration fields.

- `POST /v2/zoom_events/events/{eventId}/tickets`
