Updated the app.js code and README.md files so that PrismarineJS can be used under the latest NodeJS versions

[AyzeLYC]

Under the latest NodeJS versions if you want to use require you have to use :

import { createRequire } from "node:module"; // imports the createRequire function from the NodeJS CommonJS module handler
const require = createRequire(import.meta.url); // initializes the require function that NodeJS had under CommonJS

[extremeheat]

This is not correct

[extremeheat]

Update your node to latest (v24) if you have issue importing the package with ESM

[AyzeLYC]

This is not correct

you should try it first before saying than it doesn't work, because on my end it does work

[extremeheat]

flying-squid (as with all the other prismarinejs projects) are commonjs, not ESM. You cannot use ESM with them. If you are on a newer version of node and using ESM, you can import commonjs with a standard ESM import.

[extremeheat]

As for switching to ESM, refer to PrismarineJS/prismarine-contribute#5