Implement an endpoint to save the user timezone in Azure

[enriquezrene]

We need to implement an endpoint that can allow users to save their preferred timezone. All the data is currently being saved in UTC but we need to have this information when we want to perform specific operations like automatic clock-outs at midnight for example.

Since this information belongs to users, this needs to live in Azure and the backend will work as a gateway only contacting Azure endpoints.

[enriquezrene]

This is not really need since we are currently using the timezone from the browser which is send each time an entry is created