Request to add useParseEventSource hook so we can easily parse json data on sse

[devnomic]

Very useful since you are most likely send JSON data on sse, instead of string.

e.g.

// sending data from server side using json stringify
send({
   event: "addFileProgress",
   data: JSON.stringify(data),
});

// receive data with typed result
const progressData = useParseEventSource<AddFileProgressData>("/url", {
  event: "addFileProgress",
});

useParseEventSource.ts

import { EventSourceOptions, useEventSource } from "remix-utils/sse/react";

export function useParseEventSource<T>(
  url: string | URL,
  options?: EventSourceOptions
): T | null {
  const latest = useEventSource(url, options);

  if (latest) {
    try {
      return JSON.parse(latest) as T;
    } catch {
      return null;
    }
  }
  return null;
}