feat(core): Initial support for two-way communication over websockets (#7570)

- Enable two-way communication with web sockets
- Enable sending push messages to specific users
- Add collaboration service for managing active users for workflow

Missing things:
- State is currently kept only in memory, making this not work in
multi-master setups
- Removing a user from active users in situations where they go inactive
or we miss the "workflow closed" message
- I think a timer based solution for this would cover most edge cases.
I.e. have FE ping every X minutes, BE removes the user unless they have
received a ping in Y minutes, where Y > X
- FE changes to be added later by @MiloradFilipovic 

Github issue / Community forum post (link here to close automatically):

---------

Co-authored-by: कारतोफ्फेलस्क्रिप्ट™ <aditya@netroy.in>

packages/cli/src/LoadNodesAndCredentials.ts

@@ -340,7 +340,7 @@ export class LoadNodesAndCredentials {
 				loader.reset();
 				await loader.loadAll();
 				await this.postProcessLoaders();
-				push.send('nodeDescriptionUpdated', undefined);
+				push.broadcast('nodeDescriptionUpdated');
 			}, 100);
 
 			const toWatch = loader.isLazyLoaded