Produce JS-visible string results as UTF-16 at their source, including
numeric formatting, BigInt and BigFraction formatting, URI encoding,
console formatting, parser errors, regular expression errors, Intl and
Temporal records, LibUnicode locale boundaries, and LibWeb bindings.
Handle fractional radix formatting through the UTF-16 builder view.
Many generated Web IDL prototype and constructor objects have no
per-interface storage and no custom virtual behavior. They only differ
by metadata such as their exposed name, parent interface, constructor
hook, and generated initialization functions.
Add shared InterfacePrototypeObject and InterfaceConstructor classes for
these simple interfaces. The generators now emit per-interface metadata
and static helper functions instead of distinct GC::Cell subclasses when
the interface does not need special object behavior.
This avoids creating separate type-isolated GC allocators for hundreds
of otherwise empty prototype and constructor classes, while preserving
constructors, unforgeable attributes, IDL conversions, and immutable
prototypes in the global prototype chain.
