ref: PP013

User story

Is your feature request related to a problem? Please describe.
As a new role user, when an administrator assigns me I don't receive any kind of notification that I have a new role assigned. For instance, when I'm assigned as:

• an Administrator to a Participatory Process
• a Moderator to an Assembly
• a Collaborator to a Participatory Process

Describe the solution you'd like
To receive an email and a notification that I've been assigned this new role.

Describe alternatives you've considered

• Receive an alert

Additional context
N/A

Does this issue could impact on users private data?
No

Acceptance criteria

• When an admin creates a new Administrator role for a Participatory Process, Assembly or Conference, the participant should receive an email
• When an admin creates a new Collaborator role for a Participatory Process, Assembly or Conference, the participant should receive an email
• When an admin creates a new Moderator role for a Participatory Process, Assembly or Conference, the participant should receive an email
• When an admin creates a new Valuator role for a Participatory Process, Assembly or Conference, the participant should receive an email