LibJS: Implement ShadowRealm.prototype.evaluate()

Author: https://github.com/linusg
Commit: c70784bb82
Pull-request: https://github.com/SerenityOS/serenity/pull/10463
Reviewed-by: https://github.com/IdanHo

Userland/Libraries/LibJS/AST.cpp

@@ -150,6 +150,9 @@ Value BlockStatement::execute(Interpreter& interpreter, GlobalObject& global_obj
 
 Value Program::execute(Interpreter& interpreter, GlobalObject& global_object) const
 {
+    // FIXME: This tries to be "ScriptEvaluation" and "evaluating scriptBody" at once. It shouldn't.
+    //        Clean this up and update perform_eval() / perform_shadow_realm_eval()
+
     InterpreterNodeScope node_scope { interpreter, *this };
 
     VERIFY(interpreter.lexical_environment() && interpreter.lexical_environment()->is_global_environment());