feat(components/forms): change SkyCheckboxChange type to an interface

change the `SkyCheckboxChange` type from a class to an interface

BREAKING CHANGE: This change updates the `SkyCheckboxChange` type to be an interface instead of a
class. To address this, remove any instances of instantiating the `SkyCheckboxChange` class and
instead create an object that uses the interface type.

libs/components/forms/src/lib/modules/checkbox/checkbox-change.ts

@@ -4,7 +4,7 @@ import { SkyCheckboxComponent } from './checkbox.component';
 /**
  * Fires when users select or deselect the checkbox.
  */
-export class SkyCheckboxChange {
-  public source: SkyCheckboxComponent | undefined;
-  public checked: boolean | undefined;
+export interface SkyCheckboxChange {
+  source: SkyCheckboxComponent | undefined;
+  checked: boolean | undefined;
 }

libs/components/forms/src/lib/modules/checkbox/checkbox.component.ts

@@ -304,9 +304,7 @@ export class SkyCheckboxComponent implements ControlValueAccessor, OnInit {
   #controlValueAccessorChangeFn: (value: any) => void = (value) => {};
 
   #emitChangeEvent(): void {
-    const event = new SkyCheckboxChange();
-    event.source = this;
-    event.checked = this.#_checked;
+    const event: SkyCheckboxChange = { source: this, checked: this.#_checked };
 
     this.#controlValueAccessorChangeFn(this.#_checked);
     this.change.emit(event);

libs/components/list-builder-view-checklist/src/lib/modules/list-view-checklist/fixtures/list-view-checklist-toolbar.component.fixture.ts

@@ -32,7 +32,7 @@ export class ListViewChecklistToolbarTestComponent {
   }
 
   public changeVisibleItems(checked: boolean): void {
-    const checkbox = new SkyCheckboxChange();
+    const checkbox = { checked } as SkyCheckboxChange;
     checkbox.checked = checked;
     this.checklist.changeVisibleItems(checkbox);
   }