⭐️ Make `composer create-project` installable

[bobdenotter]

[JarJak]

To be included: way to enable/disable debug mode (with web profiler). Maybe with Symfony Recipe?

[bobdenotter]

Not yet finished at all, but it's kinda working: https://github.com/bolt/four-project

[bobdenotter]

Closing this for now.. Basic functionality is working. Extra goodies like toggling on/off the debug/profiler will be added later.