feat(ng-core): Deprecate WrappedFormControlSuperclass to encourage …

…type safe alternatives

projects/ng-core/src/lib/forms/wrapped-form-control-superclass.ts

@@ -2,7 +2,9 @@ import { FormControl } from '@angular/forms';
 import { WrappedControlSuperclass } from './wrapped-control-superclass';
 
 /**
- * This is a convenience class to make it easier to extend {@linkcode WrappedControlSuperclass} when you specifically want a `FormControl` (as opposed to a `FormArray` or `FormGroup`).
+ * This class is deprecated because its `control` implementation is not type safe. Transition to a type safe alternative by directly inheriting from {@linkcode WrappedControlSuperclass} and setting up your control with the typing and initial value you need. See the documentation on that class for an example.
+ *
+ * @deprecated
  */
 export abstract class WrappedFormControlSuperclass<
   OuterType,