List all available webhook events.
Required scope: read
Returns a list of events that can be subscribed to:
proposal.created - When a new proposal is createdproposal.updated - When a proposal is updatedproposal.status_changed - When proposal status changesproposal.shared - When a proposal is sharedproposal.viewed - When a shared proposal is viewedproposal.response_received - When client responds to a proposalproposal.deleted - When a proposal is deleted