Add automatic schema checker to validate gorefs.yaml

[sujaypatil96]

After completing both issue #1803 and #1804, we need to add a schema checker, which should be a JSON Schema file that validates any future modifications made to the gorefs.yaml file in a Github Action step.

We can break out the tasks for this issue into two steps:

• Create JSON Schema file that appropriately describes the structure of the data that should be present in the gorefs.yaml file
• Add jsonschema CLI validate command to Github Actions so it verifies the correctness of file after every modification to it

[kltm]

To fit with the current naming conventions, unless there is other mechanism needed or reason otherwise, /metadata/gorefs.schema.yaml would be fine here.

[kltm]

Closing out in preference for new worklist