Search endpoint

[romaintailhurat]

In the current spec, the /search endpoint only support search on labels (using /search/labels), it should probably be extended to other fields (like names or userId).

[NicoLaval]

Right now it’s only /search/labels. It makes sense as a first step.

We'll want other fields later (description, name, …), either more endpoints or a /search with a fields param.

It has to be defined.