Option to make appointments not associated with person

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

The current public appointment booking page contains the avatar and name of the owner of the appointment. This is unintuitive if you want to use the booking feature for a room or another resource.

Describe the solution you'd like

'Create Appointmen' modal:

• add checkbox 'personal appointment' (default: yes)
• add description 'Your personal avatar and name will be displayed on the appointment booking page.'

Appointment booking page:

• hide the avatar and 'booking__display-name'

Describe alternatives you've considered

A cooler but a bit more work-intensive alternative would be: If the checkbox 'personal appointment' is unchecked, to show an upload-button for a cusom appointment image and a text input for a custom 'room or resource title' and show these instead of the avatar and the owner's name.

Additional context

No response

Start by locating the Create Appointment modal and the public appointment booking page, then trace how appointment ownership is passed between them. Implement the requested personal-appointment option and verify that an unchecked option hides the owner's avatar and display name; the alternative custom image and title is optional in the issue description.