Added docs for RavenDB as State Store

[nmalocic]

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Description

Added documentation for RavenDB state store

Issue reference

https://github.com/dapr/components-contrib/pull/3702

[nmalocic]

Hi @msfussell , @cicoyle I have opened new PR, since old one was pointing to v1.15 and this way looked way easier

[msfussell]

@nmalocic - This is ready to go, once the code is merged.

[marcduiker]

@nmalocic The format of generic.yaml changed with 1.16. The query field has been removed. I've updated this PR to reflect this. Do you know if RavenDB supports Dapr Actors or Workflow?

[nmalocic]

Hi @marcduiker,

I am not sure, I didn't to any specific work to support Actors and Workflows.