[Tagging] Feature Proposal - RFC - quiet_hours

[Anne-Karoline Distel]

Hello,

following the discussion on opening_hours:autism, I have changed the key
to quiet_hours which is less restrictive and does not violate the
opening_hours namespace:
https://wiki.openstreetmap.org/wiki/Proposed_features/quiet_hours

Please discuss on the Talk page:
https://wiki.openstreetmap.org/wiki/Talk:Proposed_features/quiet_hours.

Thank you!

Anne