Create Ban API to be able to mute users for a period of time

[pentreathm]

Based on the following DAO request https://governance.decentraland.org/proposal/?id=7d29f610-e656-11eb-89c8-f9c6d1f05e5b https://github.com/decentraland/explorer/issues/2519

We need to create a method to Mute users from the different chat systems for a determine period of time, we should also evaluate how to expose this deny list