refactor(elements): update with latest source changes

[damyanpetev]

Closes #

Additional information (check all that apply):

• Bug fix
• New functionality
• Documentation
• Demos
• CI/CD

Checklist:

• All relevant tags have been applied to this PR
• This PR includes unit tests covering all the new code (test guidelines)
• This PR includes API docs for newly added methods/properties (api docs guidelines)
• This PR includes feature/README.MD updates for the feature docs
• This PR includes general feature table updates in the root README.MD
• This PR includes CHANGELOG.MD updates for newly added functionality
• This PR contains breaking changes
• This PR includes ng update migrations for the breaking changes (migrations guidelines)
• This PR includes behavioral changes and the feature specification has been updated with them

[Copilot]

Pull Request Overview

This PR refactors the Angular Elements implementation to align with the latest source changes from @angular/elements, updating the change detection strategy and improving the component initialization flow.

• Updates copyright and license information to match Angular's current format
• Replaces custom change detection logic with Angular's new scheduler-based approach
• Simplifies input handling by using the new setInput API instead of manual property assignment

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
ng-element-strategy.ts	Major refactor to use Angular's scheduler-based change detection and simplified input handling
custom-strategy.ts	Updates to maintain compatibility with the refactored base strategy class

Comments suppressed due to low confidence (1)

projects/igniteui-angular-elements/src/app/ng-element-strategy.ts:1

• This TODO comment appears to reference specific implementation details without explaining the complete context or timeline for resolution. Consider providing more detail about when this temporary solution will be addressed.

/* eslint-disable @typescript-eslint/explicit-member-accessibility */

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[Copilot]

Using private Angular APIs (ɵ-prefixed) creates a risk of breaking changes in future Angular versions. Consider if there are public APIs available or document this dependency carefully.

Suggested change

	ɵmarkForRefresh as markForRefresh,
	OutputRef,
	ChangeDetectorRef,

[Copilot]

Unused imports should be removed. ChangeDetectorRef and OnChanges were removed from the import but other potentially unused imports like DestroyRef, QueryList, and reflectComponentType remain.

Suggested change

	import { ApplicationRef, ComponentFactory, ComponentRef, DestroyRef, EventEmitter, Injector, QueryList, Type, ViewContainerRef, reflectComponentType } from '@angular/core';
	import { ApplicationRef, ComponentFactory, ComponentRef, EventEmitter, Injector, Type, ViewContainerRef } from '@angular/core';