E-Mail as a new input field

[chnuessli]

Based on feedback from institutions, it would be desirable to also collect the email addresses of operators on a voluntary basis.
Background: Automated information from applications that a defibrillator was needed.

I started a discussion about this in the OSM forum some time ago and received no vetoes: https://community.openstreetmap.org/t/contact-email-auf-emergency-defibrillator/129244

Therefore, we can implement this. However, I need your help @elektrolytmangel

[chnuessli]

f53665e

[elektrolytmangel]

What is the exact OSM-Tag to set? "operator:email" or only "email" or something else?
For the operator-phone we use the tag "phone".

[chnuessli]

As discussed on the forum, we take "email".