Add Zoho Calendar

[lrpradeepkumar-zoho]

Add Zoho calendar to the list

[jekuer]

First update.
Currently not (or no longer) possible.
We are in contact with ZOHO about it. 🤞🏼

[jekuer]

Next update:
It is currently not possible at all.
Discussed with ZOHO and they have it on their roadmap. Requirements from our side got added.
For now, I would convert this into a discussion, since there is nothing we can do as long as they did not play their part.