[DOC] Add Docs for Constant Keyword Field

[hasnain2808]

What do you want to do?

• Request a change to existing documentation
• Add new documentation
• Report a technical problem with the documentation
• Other

Tell us about your request. Provide a summary of the request and all versions that are affected.
Pull Request -> opensearch-project/OpenSearch#12285

What other resources are available? Provide links to related issues, POCs, steps for testing, etc.
Issue -> opensearch-project/OpenSearch#9981

[hdhalter]

Thanks, @hasnain2808 ! Would you like to contribute the documentation for this feature? See https://github.com/opensearch-project/documentation-website/blob/main/CONTRIBUTING.md#contributing-content.

[hasnain2808]

@hdhalter
I would like to try this out but it might take some time. Is there some deadline we track with regards to merging the actual pr?

[hdhalter]

@hdhalter I would like to try this out but it might take some time. Is there some deadline we track with regards to merging the actual pr?

That would be great! Since this is not tied to a release, there is no deadline to merge. PRs go through our internal review review process, so it might take some time before we can merge anyway.

[hasnain2808]

@hdhalter
Is there a requirement for the documentation pr to be ready for the code pr to be merged?

[hdhalter]

@hdhalter Is there a requirement for the documentation pr to be ready for the code pr to be merged?

Not at this time. But we are talking about implementing something that restricts a PR from being merged unless a doc PR is up and in review.