Add a filter to pass dynamic serialization groups in the URL

`http://example.com/books?groups=group1,group2` should add the passed groups to the list of applied groups. The groups configured tru annotations should be preserved or not depending of a configuration flag.

The filter should **not** be Doctrine dependent. It must implement the `FilterInterface` (to appear in the documentation) and decorate the `SerializerContextBuilder` to apply groups.