WebContent+LibWeb+LibJS: Report exceptions to the JS console

Print exceptions passed to `HTML::report_exception` in the JS console

Refactored `ExceptionReporter`: in order to report exception now
you need to pass the relevant realm in it. For passed `JS::Value`
we now create `JS::Error` object to print value as the error message.

Userland/Libraries/LibWeb/DOM/EventDispatcher.cpp

@@ -114,7 +114,7 @@ bool EventDispatcher::inner_invoke(Event& event, Vector<JS::Handle<DOM::DOMEvent
         // If this throws an exception, then:
         if (result.is_error()) {
             // 1. Report the exception.
-            HTML::report_exception(result);
+            HTML::report_exception(result, realm);
 
             // FIXME: 2. Set legacyOutputDidListenersThrowFlag if given. (Only used by IndexedDB currently)
         }