Support ES modules

The runtime currently handles commonjs modules - and if an import statement is encountered the application will crash.

The implementation is currently in ModuleInternal.mm

It would be awesome if es modules were supported, since v8 already supports them - we are just missing the implementation for loading them (same-ish logic as for commonjs)

A reduced example for supporting es modules: https://stackoverflow.com/a/52031275/2270725

The gist of it is - we have to call ScriptCompiler::CompileModule on the source

Local<Module> module;
if (!ScriptCompiler::CompileModule(isolate, &source).ToLocal(&module)) {
  // if you have a v8::TryCatch, you should check it here.
  return;
}

Unresolved questions:

• Can the runtime support both types and interop between them?

Comienza en ModuleInternal.mm siguiendo el flujo de carga de commonjs existente y compáralo con el ejemplo proporcionado de ScriptCompiler::CompileModule. Investiga cómo deberían funcionar la carga de módulos de V8 y la interoperabilidad con commonjs. Se considera terminado cuando las instrucciones de importación ya no provocan fallos y el entorno de ejecución admite la interacción prevista entre ambos tipos de módulos.