message: packages/core-api: re-use Config type from config package
diff: * limitations under the License.
  */
  import { createApiRef } from '../ApiRef';
  -
  -export type Config = {
  - getConfig(key: string): Config;
  -
  - getConfigArray(key: string): Config[];
  -
  - getNumber(key: string): number | undefined;
  -
  - getBoolean(key: string): boolean | undefined;
  -
  - getString(key: string): string | undefined;
  -
  - getStringArray(key: string): string[] | undefined;
  -};
  +import { Config } from '@backstage/config';
  // Using interface to make the ConfigApi name show up in docs
  export interface ConfigApi extends Config {}
  