Enable JustCall integration functionality within the HubSpot mobile app for iOS, allowing users to make and receive calls, send messages, and log activities directly from the HubSpot iOS app

Currently, the JustCall integration works on Android devices within the HubSpot mobile app, but iOS users cannot access the same functionality. Adding JustCall support for iOS on HS would ensure that all mobile users, regardless of their device, can manage calls, messages, and communication logs directly from HubSpot. This would improve mobile productivity, provide a consistent user experience across platforms, and enhance CRM efficiency for teams relying on iOS devices.