Web - Start/stop UX, background option

[iignatevich]

No description provided.

[iberdinsky-skilld]

Works for me on macos

[davidferlay]

All feedbacks ok 👌

➜ plasmactlui web
Web running in background with PID:33497
http://localhost:8080

➜ plasmactlui web stop        
Web server stopped successfully

➜ plasmactlui web --foreground
Starting server on http://localhost:8080

logs for running background web in %binary_name/web/out.log | err.log