[feature] Add restart command for WebSocket server

[zaxxo]

This PR adds a console command for restart the WebSocket server.

For example if you deploy with Laravel Envoyer the server should be restarted because of a new version of the WebSocket package.

The command is inspired by the queue restart command.

Please note that this only works if the server is automatically restarted by Supervisor or something else as the server is only stopped with this command.

[dgoring]

Can this be re-considered as it would be very useful
and would bring it inline with the queue commands, which i use in my environment deployment script.

[N3rdP1um23]

I would love an update if possible! I have some projects with Forge and Envoyer and every new deployment breaks since Envoyer updates the deployment folder.

[slavarazum]

Yep, I just come to repository to search some solutions. It would be great to have an ability to restart server after each deploy.

[rennokki]

@zaxxo I need a rebase on this PR.

[zaxxo]

@rennokki I have done a rebase.

[rennokki]

@zaxxo Do you need this feature right away? I plan on focusing on the feature PRs after the other fixes PRs are resolved.

[zaxxo]

From my side, I don't need it right away. But I can't speak for the other participnats in this conversation.

In the meantime until the PR is merged, if anyone should need a restart command right away, you can use my package:

https://github.com/zaxxo/laravel-websockets-restart