Add infos to doc how to add PhpStorm protocol for Windows.

[oliverhermanni]

Files in the Ray app won't open, because Windows doesn't understand the PhpStorm protocol. This issue can be fixed by using this. It might sound a little bit fishy to add something to the registry by hand, but the solution is also mentioned on Laracasts.

I recommend to add this info to the docs.

[freekmurze]

Thanks for mentioning this. Could you PR this to the docs? There's an edit button above every page. This way you get contribution credits 🙂

[oliverhermanni]

Yay!