docs(angular): add control value accessor content (#6528)

src/data/roadmaps/angular/content/control-value-accessor@m5dgKgUR3ZqI9sBAzToev.md

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 # Control Value Accessor
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+Defines an interface that acts as a bridge between the Angular forms API and a native element in the DOM. Implement this interface to create a custom form control directive that integrates with Angular forms.
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+Visit the following resources to learn more:
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+- [@official@Angular Official Docs - ControlValueAccessor](https://angular.dev/api/forms/ControlValueAccessor)
+- [@article@Mastering Angular Control Value Accessor: A guide for Angular Developer](https://hackernoon.com/mastering-angular-control-value-accessor-a-guide-for-angular-developer)
+- [@article@Angular Custom Form Controls](https://blog.angular-university.io/angular-custom-form-controls/)