A broadcast is a message sent to every running app that uses Puter.js.
Broadcasts have a name and a data payload, and are sent as a 'broadcast'
message.
Send a broadcast using:
`globalThis.services.get('broadcast').sendBroadcast(...)`
When doing so, you have the option to keep the broadcast message around,
so that it can be sent to any newly-launched apps. Sending another
broadcast with the same name will overwrite the previous one, so you
don't have to worry about flooding a new app with duplicates.
KernelDeimos