App/Backend should import techdocs plugin only, not common package

If a backstage App wants to enable techdocs plugin, it should only have to care about installing @backstage/plugin-techdocs and @backstage/plugin-techdocs-backend.
@backstage/plugin-techdocs-backend should re-export necessary APIs from techdocs-common

packages/backend/package.json

@@ -31,7 +31,6 @@
     "@backstage/plugin-scaffolder-backend": "^0.3.2",
     "@backstage/plugin-sentry-backend": "^0.1.3",
     "@backstage/plugin-techdocs-backend": "^0.3.0",
-    "@backstage/techdocs-common": "^0.1.1",
     "@gitbeaker/node": "^25.2.0",
     "@octokit/rest": "^18.0.0",
     "azure-devops-node-api": "^10.1.1",

packages/backend/src/plugins/techdocs.ts

@@ -13,9 +13,8 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
-import { createRouter } from '@backstage/plugin-techdocs-backend';
 import {
+  createRouter,
   DirectoryPreparer,
   Preparers,
   Generators,
@@ -23,7 +22,7 @@ import {
   CommonGitPreparer,
   UrlPreparer,
   Publisher,
-} from '@backstage/techdocs-common';
+} from '@backstage/plugin-techdocs-backend';
 import { PluginEnvironment } from '../types';
 import Docker from 'dockerode';
 

packages/create-app/templates/default-app/packages/backend/src/plugins/techdocs.ts

@@ -1,11 +1,11 @@
 import {
   createRouter,
   DirectoryPreparer,
-  CommonGitPreparer,
   Preparers,
   Generators,
-  Publisher,
   TechdocsGenerator,
+  CommonGitPreparer,
+  Publisher,
 } from '@backstage/plugin-techdocs-backend';
 import { PluginEnvironment } from '../types';
 import Docker from 'dockerode';

plugins/techdocs-backend/src/index.ts

@@ -15,3 +15,4 @@
  */
 
 export * from './service/router';
+export * from '@backstage/techdocs-common';