LibJS: Enable EXPLICIT_SYMBOL_EXPORT

Author: https://github.com/ayeteadoe
Commit: c14173f651
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/5215
Reviewed-by: https://github.com/ADKaster ✅

Libraries/LibJS/Forward.h

@@ -9,6 +9,7 @@
 
 #include <AK/Concepts.h>
 #include <AK/Types.h>
+#include <LibJS/Export.h>
 
 #define JS_DECLARE_NATIVE_FUNCTION(name) \
     static JS::ThrowCompletionOr<JS::Value> name(JS::VM&)