Add support for GCS datastore

[bjornleffler]

Checklist

• My issue is specific & actionable.
• I am not suggesting a protocol enhancement.
• I have searched on the issue tracker for my issue.

Description

I've built a new go-datastore for Google Cloud Storage (GCS), available at:
https://github.com/bjornleffler/go-ds-gcs

I would like to:

1. Add a new config profile to kubo to simplify configuring kubo with the GCS datastore.
2. Merge github.com/bjornleffler/go-ds-gcs as github.com/ipfs/go-ds-gcs

This new feature is code complete, tested and documented.

[lidel]

Triage notes:

• every built-in datastore support introduces maintenance cost (see Badger2 integration #9230)
• on top of that, the policy is to not include datastores specific to commercial services, for the same reason we don't have S3 one, and it lives in separate repository

Instead of introducing code to this repo, out suggestion here is to do keep this as plugin (https://github.com/bjornleffler/go-ds-gcs), and add "External datastore plugins" section to README or /docs/plugins|datastores 🙏

This way people will be able to discover third-party backends without introducing maintenance cost here.

[bjornleffler]

I totally get the maintenance issue, maintaining code is hard. I can figure out some way to do the configuration separately form the main kubo binary. Probably something like this:
https://github.com/ipfs/go-ds-s3#configuration

How do I get my code merge my datastore code as a separate repository, similar to the S3 datastore repository?

[BigLep]

@lidel : I reopened so we speak to the question about repository location.

[lidel]

• We are happy to take new (maintained) datastores under https://github.com/ipfs-shipyard/ umbrella
  • (the ``go-ds-s3is inipfs/` for legacy reasons, because we don't want to break existing users)
  • @bjornleffler if you want to donate your repo to ipfs-shipyard/ and still be its maintainer, add me as Admin, and I'll move it (or just keep it as is, if yo udont want to break your existign users)

[github-actions]

Oops, seems like we needed more information for this issue, please comment with more details or this issue will be closed in 7 days.

[bjornleffler]

Yes, that sounds great. Lets move the repository into the new location. Existing users can migrate.

Apologies for the late reply, I missed the previous notification.

[lidel]

@bjornleffler I seem to still lack permissions, maybe Transfer repo to me? I will re-add you after I'm done with moving it it the right place.

[bjornleffler]

Transfer requested. Please let me know if you need anything else.

[lidel]

That did the trick, thank you! Done: https://github.com/ipfs-shipyard/go-ds-gcs/

@bjornleffler you should have necessary permissions to continue being the maintainer of that repo.
If anything is missing, feel free to reach out (email, or Slack/Matrix in #ipfs-implementes room)