usb: hlib: use "unsafe" direct event calls to work without strings

usb refactoring: no more xhci-specific code in main usb.h file

usb : print usb version

shell: don't even try to create a "" program without a name

xhci refactoring: sperate out all xhci-related code to its own directory

xhci: refactoring: move out xhci controller code

xhci: refactoring: use SlotXHCI instead of long parameter list

xhci: refactor and seperate out commands

xhci: refactor trbRing functions to seperate file

vga: add scrolling when exceeding maximum default line count

shell / ioManager: don't allow backspace when input buffer is empty

fix issue #3: crash when running an unknown program

xhci: show device information using usb strings

xhci: print basic usb device information

xhci: clean up slot initialization

xhci: send get device information command to attached usb devices

xhci: configure endpoint

xhci: send address device command

fix weird problems with getPhysicalAddress system call

xhci: request a slot for each activated port

enable xhci ports with a connection

fix issue with printing where the first message would not get printed

create async xhci command function using events

trigger interrupts from xhci controller

fix issue vga driver: newline doesn't move cursor #2

use sleep function for xhci driver waiting for the controller to start

add sleep function to PIT driver

add system time readout

add basic PIT timer outline

receive xhci events