Extract Rest API from Rudder-web project into a new Scala project
Rudder-web contains both the wep app and the rest API.
There is no need to have both in the same project which make it quite huge.
Plus it link both code very deeply even it there is no need, maybe we would like one day to have Rest API and web application completely separated (not the same framework ... 2 webapps ...)
Fixes #11677: Extract Rest API from Rudder-web project into a new Scala project