Create a distributable Github Action for YAML Validation

[trouze]

Takes a YAML file and validates it against JSON schemas before using terraform and requiring dbt platform credentials.

uses: trouze/terraform-dbtcloud-yaml/validate@v1
  with:
    file: dbt-config.yml

[trouze]

we did this! I just think it needs to be integrated into the existing topologies folder that gets zipped - that way people can use it without much effort.