refactor(elements,grid): move childrenResolved event to elements project (#17140)

Co-authored-by: Damyan Petev <damyanpetev@users.noreply.github.com>

Author: Copilot

projects/igniteui-angular-elements/src/lib/grids/grid.component.ts

@@ -144,6 +144,12 @@ export class IgxGridElementsComponent extends IgxGridComponent {
     @Output()
     public columnsAutogenerated = new EventEmitter<IColumnsAutoGeneratedEventArgs>();
 
+    /**
+     * Emitted when content children are resolved and collections in grid are updated.
+     */
+    @Output()
+    public childrenResolved = new EventEmitter<void>();
+
     /* contentChildren */
     /* blazorTreatAsCollection */
     /* blazorCollectionName: ActionStripCollection */

projects/igniteui-angular-elements/src/lib/grids/hierarchical-grid.component.ts

@@ -140,6 +140,12 @@ export class IgxHierarchicalGridElementsComponent extends IgxHierarchicalGridCom
     @Output()
     public columnsAutogenerated = new EventEmitter<IColumnsAutoGeneratedEventArgs>();
 
+    /**
+     * Emitted when content children are resolved and collections in grid are updated.
+     */
+    @Output()
+    public childrenResolved = new EventEmitter<void>();
+
     /* contentChildren */
     /* blazorTreatAsCollection */
     /* blazorCollectionName: ActionStripCollection */

projects/igniteui-angular-elements/src/lib/grids/tree-grid.component.ts

@@ -134,6 +134,12 @@ export class IgxTreeGridElementsComponent extends IgxTreeGridComponent {
     @Output()
     public columnsAutogenerated = new EventEmitter<IColumnsAutoGeneratedEventArgs>();
 
+    /**
+     * Emitted when content children are resolved and collections in grid are updated.
+     */
+    @Output()
+    public childrenResolved = new EventEmitter<void>();
+
     /* contentChildren */
     /* blazorTreatAsCollection */
     /* blazorCollectionName: ActionStripCollection */

projects/igniteui-angular/grids/grid/src/grid-base.directive.ts

@@ -1008,14 +1008,6 @@ export abstract class IgxGridBaseDirective implements GridType,
     @Output()
     public selectedRowsChange = new EventEmitter<any[]>();
 
-    /* blazorInclude */
-    /** @hidden @internal */
-    /**
-     * Emitted when content children are resolved and collections in grid are updated.
-     */
-    @Output()
-    public childrenResolved = new EventEmitter<void>();
-
     /**
      * Emitted when the expanded state of a row gets changed.
      *