Add Layer information when layer=None

[NicoJG]

Is it possible to add the information of which Layer a given Feature belongs to when vt_bytes_to_geojson has the parameter layer=None?
I want to read in a .mvt file, but if I don't specify what Layer I want to read in all data gets combined into a single list of features.
This is annoying if you want to read in, but know all the Layers.
But if you don't know the Layers there is no way to examine the data and one has to fall back to mapbox_vector_tile.

Regarding this, it would be nice if the layer parameter could also be a list of layer names.