Added Custom Action "Send WhatsApp Message" for HubSpot workflows automation.

WhatsApp conversations are now synced as "Log WhatsApp message" entities to activity stream of Contact and Deal. Same conversation is now linked both to a contact and to a deal.

Improved Contact phone matching: WhatsApp conversation will be matched to a Contact even if the phone number in Contact is not in international format (missing country code, includes non-numeric formatting characters, etc).