Added a config.d.ts

Signed-off-by: Karan Shah <karan.shah@simplybusiness.co.uk>

plugins/airbrake-backend/src/config/ExtractAirbrakeConfig.ts

@@ -14,18 +14,7 @@
  * limitations under the License.
  */
 import { Config } from '@backstage/config';
-
-/**
- * The Airbrake config object
- *
- * @public
- */
-export type AirbrakeConfig = {
-  /**
-   * The API Key
-   */
-  apiKey: string;
-};
+import { AirbrakeConfig } from '.';
 
 /**
  * Extract the Airbrake config from a config object
@@ -34,7 +23,9 @@ export type AirbrakeConfig = {
  *
  * @param config - The config object to extract from
  */
-export function extractAirbrakeConfig(config: Config): AirbrakeConfig {
+export function extractAirbrakeConfig(
+  config: Config,
+): AirbrakeConfig['airbrake'] {
   return {
     apiKey: config.getString('airbrake.apiKey'),
   };

plugins/airbrake-backend/src/config/index.ts

@@ -15,4 +15,4 @@
  */
 
 export { extractAirbrakeConfig } from './ExtractAirbrakeConfig';
-export type { AirbrakeConfig } from './ExtractAirbrakeConfig';
+export type { Config as AirbrakeConfig } from '../../config';