Keep the JsonWebKey dictionary types in line with other dictionary
types in the codebase by putting them in the Crypto namespace
rather than under Web::Bindings.
This has quite a lot of fall out. But the majority of it is just type or
UDL substitution, where the changes just fall through to other function
calls.
By changing property key storage to UTF-16, the main affected areas are:
* NativeFunction names must now be UTF-16
* Bytecode identifiers must now be UTF-16
* Module/binding names must now be UTF-16
We do not concern ourselves with small OOM handling any longer. But the
main point of this patch is that we are for some reason getting a build
error with clang-19 here about ignoring a nodiscard return type inside
JsonArray::try_for_each.
Resulting in a massive rename across almost everywhere! Alongside the
namespace change, we now have the following names:
* JS::NonnullGCPtr -> GC::Ref
* JS::GCPtr -> GC::Ptr
* JS::HeapFunction -> GC::Function
* JS::CellImpl -> GC::Cell
* JS::Handle -> GC::Root
