Notification for people in organization

[Avaneesh-Chopdekar]

Is your feature request related to a problem? Please describe.
Let's say a housing society is using this application and they want to send notifications to their residents if some guest or delivery boy appears. In case of a school or a college, parents would enter for inquiring purpose for their kid's admission, here the faculty whose job is to consult with parents regarding their kid's admission would get a notification. So, lets say organization has created a custom field called "Role". If Role is set to "Outsider" in case of housing society, then the people with Role = "Resident" would get a notification.

Describe the solution you'd like
Send a notification to people with certain custom fields selected using a dedicated mobile app or email. To use email, Person model would be modified to have a new email field.

Describe alternatives you've considered
Add a calling feature like how intercoms in real life are implemented. I would prefer the above notification approach.

Additional context
After adding a custom field in organization dashboard, add a form or a link to form for "send notification" if some specific option is selected. For that, the organization would have to configure which option should be selected by the person to trigger the notification. Make the user interface easy to understand.