Add a tutorial that explain when and to who each email is sent

[Valentina R]

Many customers don’t know when the ‘appointment confirmed’ email is sent. Many people confirm already paid or unpaid appointments even though they don’t require confirming.

[Valentina R]

Please add this to the Tooltip of the “Appointment Confirmed” email in Admin:

This email is only used with the “Check availability” option that requires manual confirmation.

And please add a documentation page with emails - when each is sent.