CalDAV support#50

Hi, please support CalDav calendar support with your bookings, as not everyone is on Google Calendar on Office 365.

Here’s an example of how Harmonizely does that (better than Calendly)

https://harmonizely.com/why-us/

I would absolutely need this too!

That would be awesome. I could use my nextcloud calendars without giving data to Google or Microsoft or fighting with the Outlook automated Booking emails I cannot customize.