promote all backend feature exports to main entry point

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

plugins/techdocs-backend/src/index.ts

@@ -25,6 +25,7 @@ import {
   DocsBuildStrategy as _DocsBuildStrategy,
   TechDocsDocument as _TechDocsDocument,
 } from '@backstage/plugin-techdocs-node';
+import { techdocsPlugin as feature } from './plugin';
 
 export { createRouter } from './service';
 export type {
@@ -42,6 +43,10 @@ export type {
   TechDocsCollatorOptions,
 } from './search';
 
+/** @public */
+const _feature = feature;
+export default _feature;
+
 /**
  * @public
  * @deprecated import from `@backstage/plugin-techdocs-node` instead