Use signals to avoid markForCheck.
Simplify takeUntilDestroyed usage by relying on implicit DestroyRef.
Improve type safety by typing inject(ElementRef).
(cherry picked from commit a0b998e293)
To increase the ease of development we are moving @angular/docs into the adev directory within this repo. While
we are doing this to improve our development experience in the short term, efforts are also in place
to maintain a division between this @angular/docs (shared) code and adev itself, so that it can be extracted
back out in the future when components is ready to leverage it as well.
PR Close#57132
