smartcontractkit/.github is Chainlink's new monorepo for reusable public actions.
The plan is to eventually migrate all actions in this repository to the .github repository. Please refrain from making new actions here if possible.
Place your action in a logically named folder with the action.yml and README.md and anything else required for your action.
Currently we will be versioning all actions at once with github releases/tags. In the future we can look into using something like changesets which is used by external-adapters-js to version independent actions.