Enable "Do Not Dial" (DND) Sync from HubSpot to JustCall & Sales Dialer

The feature request is to allow marking a contact as "Do Not Dial" (DND) directly within HubSpot, ensuring that calls to the contact are restricted across both JustCall and Sales Dialer without requiring manual updates in each platform.
Current Behavior:
* To prevent dialing a contact, users must manually mark the contact as:
* DNCA in Sales Dialer
* DND in JustCall
* There is no direct way to mark a contact as DND in HubSpot and have this status sync with both JustCall and Sales Dialer.

Requested Enhancement:
* Introduce a mechanism that allows marking a contact as DND within HubSpot.
* Ensure that when a contact is marked as DND in HubSpot, this status is automatically synced to:
* JustCall (DND)
* Sales Dialer (DNCA)
* Prevent calls from being placed to contacts with this status.

Impact:
* Reduces manual effort required to update DND status in multiple platforms.
* Ensures compliance with contact preferences and improves user efficiency.
* Prevents unintentional calls to restricted contacts.