Post OpenSearch Transfer Tasks

[ritvibhatt]

Hi, these are next steps to track after the move to OpenSearch:

• Copy over files from https://github.com/opensearch-project/.github:
  • Add Maintainers.md
  • Update Codeowners
  • Update Code of Conduct.md
  • Update Contributing.md
  • Update Notice.txt
  • Update Security.md
• Update github workflows - make sure github workflows/CI running on production docker images
• Create an "untriaged" label in repo and copy the untriaged label workflow to ".github/workflows"
• Add code coverage to github actions workflow
• Update About section of the project
• Catch up with missing releases
  • 2.18.0
  • 2.19.0
  • 2.19.1
  • 2.19.2
  • 2.19.3
  • 3.0.0
  • 3.1.0
  • 1.3.20 (Release 1.3.20.0 #327)
• Decide on how to organize mixin project

[lukas-vlcek]

Do we want to include also missing 1.x releases? See #327

[ritvibhatt]

Sure @lukas-vlcek, I can work on that after the 3.x releases