Enhance JVM exception translation to V8

Following the conversation on #296, I'm opening this issue to suggest a better way to throw JVM exceptions within V8.

As per @irbull, the [current approach](https://github.com/eclipsesource/J2V8/blob/master/jni/com_eclipsesource_v8_V8Impl.cpp#L1679) is to grab the `Throwable` message and throw the string itself. However, there is an [Error](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error) specification that we should follow. Building an `Error` object will enable handlers to access the relevant information (name, message, stacktrace).

P.S. I would love to contribute this, but my C++ is a little rusty. If anyone would be willing to help, that'd be great.