This will later allow global objects not inheriting from the regular
JS::GlobalObject to pull in these functions without having to implement
them from scratch. The primary use case here is, again, a wrapper-less
HTML::Window in LibWeb :^)
Allocating these upfront now allows us to get rid of two hacks:
- The GlobalObject assigning Intrinsics private members after finishing
its initialization
- The GlobalObject defining the parseInt and parseFloat properties of
the NumberConstructor object, as they are supposed to be identical
with the global functions of the same name
Intrinsics, i.e. mostly constructor and prototype objects, but also
things like empty and new object shape now live on a new heap-allocated
JS::Intrinsics object, thus completing the long journey of taking all
the magic away from the global object.
This represents the Realm's [[Intrinsics]] slot in the spec and matches
its existing [[GlobalObject]] / [[GlobalEnv]] slots in terms of
architecture.
In the majority of cases it should now be possibly to fully allocate a
regular object without the global object existing, and in fact that's
what we do now - the realm is allocated before the global object, and
the intrinsics between both :^)
