[ACS-6071] fix jsdoc warnings and errors (#8948)

* fix content docs

* fix extensions docs

* fix insights docs

* [ci:force] fix jsdoc errors and warnings

* enable jsdoc linter

* [ci:force] fix demo shell jsdoc

* [ci:force] fix e2e typings

* fix typo

* fix typo

lib/content-services/src/lib/tree/components/tree.component.ts

@@ -151,10 +151,11 @@ export class TreeComponent<T extends TreeNode> implements OnInit, OnDestroy {
     /**
      * Checks if node is LoadMoreNode node
      *
+     * @param _idx (unused)
      * @param node node to be checked
-     * @returns boolean
+     * @returns `true` if there are more items to load, otherwise `false`
      */
-    public isLoadMoreNode(_: number, node: T): boolean {
+    public isLoadMoreNode(_idx: number, node: T): boolean {
         return node.nodeType === TreeNodeType.LoadMoreNode;
     }
 

lib/content-services/src/lib/tree/services/tree.service.ts

@@ -109,7 +109,6 @@ export abstract class TreeService<T extends TreeNode> extends DataSource<T> {
      * Gets children of the node
      *
      * @param parentNode Parent node
-     *
      * @returns children of parent node
      */
     public getChildren(parentNode: T): T[] {