code: def init_manifest(
      package_name: str, version: str, manifest_version: Optional[str] = "2"
  ) -> Dict[str, Any]:
      
      return {
          "package_name": package_name,
          "version": version,
          "manifest_version": manifest_version,
      }
docs: Returns an initial dict with the minimal requried fields for a valid manifest.
      Should only be used as the first fn to be piped into a `build()` pipeline.