allow querying and projecting fields of components as part of `query_contributions`

[tschaume]

pertains to https://github.com/materialsproject/MPContribs/issues/1223

Also allow querying components, e.g.

client.query_contributions(query={"data__metal": "Yes", "data__S__p__value__gt": 700, "tables__name": "S(p)"})

• interpret kwargs as query params