[WIP] #3318 RavenDB state store

[nmalocic]

Description

Initial implementation of state store for RavenDB

Issue reference

We strive to have all PR being opened based on an issue, where the problem or feature have been discussed prior to implementation.

Please reference the issue this PR will close: #[issue number]

Checklist

Please make sure you've completed the relevant tasks for this PR, out of the following list:

• Code compiles correctly
• Created/updated tests
• Extended the documentation / Created issue in the https://github.com/dapr/docs/ repo: dapr/docs#[issue number]

[berndverst]

Since the PR has [WIP] in the title I'm marking the PR as draft (and it won't be reviewed). That being said, I suggest discussing with maintainers on the issue itself before opening a PR.

New features should be discussed on an issue before opening PRs (or else your PR might not be reviewed / merged)

[github-actions]

This pull request has been automatically marked as stale because it has not had activity in the last 30 days. It will be closed in 7 days if no further activity occurs. Please feel free to give a status update now, ping for review, or re-open when it's ready. Thank you for your contributions!

[github-actions]

This pull request has been automatically closed because it has not had activity in the last 37 days. Please feel free to give a status update now, ping for review, or re-open when it's ready. Thank you for your contributions!