Appointments: make 'Please share anything that will help prepare for our meeting' customisable

[WilliamDEdwards]

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

When creating an appointment, NextCloud asks for the following fields:

• Your name
• Your email address
• Please share anything that will help prepare for our meeting

These fields do not always suffice.

Describe the solution you'd like

There are two possible solutions:

• Make the "Please share anything that will help prepare for our meeting" text customisable (this may not fit into the user's tone of voice, which is a problem for public links)
• Make fields completely customisable (this would also allow users to ask for a phone number, for example)

Describe alternatives you've considered

No response

Additional context

No response