Add new Hubspot conversations webhook event to Hubspot Trigger node

Hello!

Use case:

Hubspot (recently?) introduced the ability to trigger webhooks from conversations, sadly the hubspot trigger has a fixed scope it requests, meaning this event cannot currently be listened for.

It would be nice to either be able to add custom scopes to the hubspot trigger or for the new scope conversations.read to be added to the requested scopes.

With the accompanying options added to the trigger nodes options.