[Feature Request] SKIP Boot Plugins

[LuanTeles]

@Ec0rtd3w implemented a really nice feature in the upcoming hen 3.2.0 that if the user holds R2 while the system is booting it will skip loading boot_plugins.txt similar to what PSP/VITA cfw does.

I think it's a better choice than the one that requires to enter into recovey mode to delete it and it's very annoying to have it deleted everytime the user needs to jump into it.

[Evilnat]

The problem here is that stage0 will try to mount /dev_usb000, and that makes the hold method impossible. I can add a flag in Cobra to byppass it.

I'll see if it's possible to fix the controller sync first