Flag configuration auto-complete

GO Feature Flag offers a way to have auto-completion while creating a flag file.

To achieve this we publish a jsonschema on schemastore. The store is used by all major IDEs such as vscode, intelliJ, and others.

To enable it, you just have to use the extension .goff.yaml for your configuration file, and it will be automatically available for you (example: flag.goff.yaml).