[ACS-6620] Proper viewer extension template projection to viewer renderer (#9273)

* [ACS-6620] Proper viewer extension template projection to viewer renderer

* [ACS-6620] Use extensions instead of content for viewer config

* [ACS-6620] Lint fix

lib/content-services/src/lib/viewer/components/alfresco-viewer.component.html

@@ -24,6 +24,7 @@
     [urlFile]="urlFileContent"
     [tracks]="tracks"
     [readOnly]="readOnly"
+    [viewerExtensions]="viewerExtensions"
     (downloadFile)="onDownloadFile()"
     (navigateBefore)="onNavigateBeforeClick($event)"
     (navigateNext)="onNavigateNextClick($event)"

lib/content-services/src/lib/viewer/components/alfresco-viewer.component.ts

@@ -80,6 +80,9 @@ export class AlfrescoViewerComponent implements OnChanges, OnInit, OnDestroy {
     @ContentChild(ViewerOpenWithComponent)
     openWith: ViewerOpenWithComponent;
 
+    @ContentChild('viewerExtensions', { static: false })
+    viewerExtensions: TemplateRef<any>;
+
     /** Node Id of the file to load. */
     @Input()
     nodeId: string = null;