Support Angular 21

[huehnerlady]

Angular 21 is out now, so please add support for that :)

[StavNoyAkur8]

Someone's working on it:
#33378

[Teebo]

Is there a way to update Angular in an Nx workspace without migrating Nx?

[robertIsaac]

nx migrate @angular/cli @angular/core
but if you use @nx/* as a builder, it won't work