Display of participants' roles in the list of participants and in notification e-mails

Is your feature request related to a problem? Please describe.

Hi,

When I'm a guest (or an organizer after a while), it's hard to know what everyone's role is. Unless you click on [⋅⋅⋅] for each participant, it's not possible to know the degree of involvement of each participant at a glance. It would be necessary for "chairperson", "required", "optional" and "non-participant" to appear in brackets right next to the participant's e-mail address (or display name), just as "organizer" is already displayed in brackets next to the organizer's display name.

This information should also be included in notification e-mails to participants. We'd need to add a piece of information, which could be, for example, "Your status", or "Your presence" ... followed by the indication "Chairman", "Required" Optional", or "Non-participant". Obviously, if a participant's status is modified by the organizer, the participant concerned should receive a notification, indicating the new status.

Thanks for reading me.

Describe the solution you'd like

Describe alternatives you've considered

No response

Additional context

No response

Start by tracing the participant list and notification e-mail flows described in the issue, including where organizer labels are currently displayed. Define the role labels for chairperson, required, optional, and non-participant, then verify that they appear beside participants and in e-mails, including after an organizer changes a participant's status.