Items as Dataclasses

[mredaelli]

Is there any plan to support dataclasses as yield-able results from crawlers (and possibly meta in Request/Result)?

It would be a very welcome addition for us, mostly for typing reasons, IDE completion, additional logic.
And it should also be simple to implement (just call dataclasses.asdict())?

[gsb-eng]

@Gallaecio I would like to implement this, any discussion required before proceeding further?

[Gallaecio]

@gsb-eng I think you can go ahead.

[kmike]

+1 to add dataclasses and attrs support (in separate pull requests), I think it'd be awesome to have support for them.

[kmike]

#2807 is related, though not the same.