Document the purpose of this repository

[peternied]

How do we know if something should go into this repository, .github, project-website, vs an individual repository?

Defining characteristic is this repository is for capturing project-wide tools and I see some issues that seems more about project-wide practices, such as the following issues

• [BUG] CI broken on pull requests to main #78
• [PROPOSAL] Fix Flaky Github Actions That Use OpenSearch docker container #62
• [PROPOSAL] COMMUNICATIONS.md and Public Slack #46

We should update the readme documentation to make it clear what belongs in this repository.

[dblock]

I think org-wide things should go to .github, project-website is the website (opensearch.org). This repo, project-meta, hasn't stuck as the shared place to put things, and probably not worth trying. I'd be happy to move some issues to .github.