fix: add default exports for module and backend

plugins/qeta-backend/src/index.ts

@@ -17,4 +17,8 @@
 export * from './service/router';
 export * from './database';
 export * from './search';
-export { qetaPlugin, qetaPlugin as plugin } from './plugin';
+export {
+  qetaPlugin,
+  qetaPlugin as plugin,
+  qetaPlugin as default,
+} from './plugin';

plugins/search-backend-module-qeta/src/index.ts

@@ -5,5 +5,8 @@
  * @packageDocumentation
  */
 
-export { searchModuleQetaCollator } from './module';
+export {
+  searchModuleQetaCollator,
+  searchModuleQetaCollator as default,
+} from './module';
 export * from './collators';