Feat: Add helper to create UI event-handlers from event-creators

[christoph-fricke]

This helps to avoid boilerplate when connecting actors to UIs:

// Example event creator
const doSomething = createEvent("do.make.something", (data: string) => ({
    data,
}));

// Creating callbacks in the UI to send events to an actor
const actor = useInterpret(...); // Actor that can receive "doSomething" events

// Instead of writing UI event-handlers manually over and over again...
const handleData = (data: string) => actor.send(doSomething(data));
// ... it can be writing like this:
const handleData = doSomething.createSendCall(actor); // (data: string) => void;