Add a workflow for documenting features

[VachaShah]

Is your feature request related to a problem?
Humans have to remember to document features, or at least to open issues in documentation-website for new features/changes to be documented. This is a manual process, e.g. opensearch-project/OpenSearch#1711 (comment)

What solution would you like?
Add a workflow for creating issues in the documentation-website repo whenever a label needs-documentation is added on a PR. Refer: opensearch-project/OpenSearch#2929

What alternatives have you considered?
Create issues manually in the documentation-website whenever a feature needs to be documented.

Do you have any additional context?
Add any other context or screenshots about the feature request here.

[peternied]

I've posted a comment on the main campaign, but the related PR in the security plugin component was closed without merging. I'm going to resolve this as not fixed until the campaign has better guidance on what to do next.

• Adding workflow for creating documentation issues #1857