Catalog-info.yaml validation script

[omartheironman]

WHAT

You are receiving this PR because your repository is cataloged by unity-backstage through your catalog-info.yaml file that is located at the root level. We are adding a validation script to your workflows to ensure it is automatically validated every time you change that file.

WHY

While our current setup for backstage validation does catch errors and reports to our error validation slack channel, unity-backstage usage is growing and as a result managing errors is becoming more intricate and inefficient. This is why we are making the validation happen at the repository level.

For more information, please see unity-backstage

RUNNER LABEL

The runner is selected to be ubuntu-latest because the runner group does not automatically get added to repos under github, and since there is no need to run on self-hosted runners we decided to use ubuntu-latest. If you already have a runner attached to your repo, feel free to change the label from ubuntu-latest to unity-linux-runner, if you would like to attach unity hosted runners please submit a PR here

Created by Sourcegraph batch change omar.moharrem/backstage-catalog-validator.