Adds the new `ng generate @angular/core:inject-migration` schematic that will convert existing code from constructor-based injection to injection using the `inject` function. The migration also has a few options that should help reduce compilation errors.
This migration is slightly different than our usual ones in that it may have to update entire class or constructor declarations. We don't go through the `ts.factory.update*` APIs for this, because it can cause the entire declaration to be re-formatted. Instead, this migration tries to insert strings in a way that won't affect the user's formatting.
PR Close#57056
Implements a new `ng generate @angular/core:standalone` schematic that allows the user to convert all the declarations in a set of NgModules to standalone.
PR Close#48790
Enea Jahollari