Add a filter to pass dynamic serialization groups in the URL

[dunglas]

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.

[antograssiot]

I love this feature, we implemented something close to that in our app but we also have a Group entity so we decided to go with normalization_groups as parameter name.

[teohhanhui]

I don't like this. This reeks of implementation details being leaked.

[meyerbaptiste]

Can be closed.