backend-plugin-api: use type instead of interface to work around api-extractor bug

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

packages/backend-plugin-api/src/services/system/types.ts

@@ -19,7 +19,7 @@
  *
  * @public
  */
-export interface ServiceRef<T> {
+export type ServiceRef<T> = {
   id: string;
 
   /**
@@ -31,7 +31,7 @@ export interface ServiceRef<T> {
   toString(): string;
 
   $$ref: 'service';
-}
+};
 
 type TypesToServiceRef<T> = { [key in keyof T]: ServiceRef<T[key]> };
 type DepsToDepFactories<T> = {

packages/backend-plugin-api/src/wiring/types.ts

@@ -21,7 +21,7 @@ import { ServiceRef } from '../services/system/types';
  *
  * @public
  */
-export interface ExtensionPoint<T> {
+export type ExtensionPoint<T> = {
   id: string;
 
   /**
@@ -34,7 +34,7 @@ export interface ExtensionPoint<T> {
   toString(): string;
 
   $$ref: 'extension-point';
-}
+};
 
 export function createExtensionPoint<T>(options: {
   id: string;