Test GH actions with with dummy data

[radishmouse]

#9 was only tested locally using nektos/act.

We need to confirm that:

• if there a pull request with valid json, the validate workflow passes
• if there a pull request with invalid json, the validate workflow fails
• if there is a push with valid yaml, the new json files are committed to the repo
• if there is a push with invalid yaml, nothing is committed to the repo
• if there is a push with valid yaml, but an invalid schema.json nothing is committed to the repo
• if there is a push with valid yaml, but an invalid an json file in the json directory, nothing is committed to the repo