kernel: add free page system call

use ld-level allocation of allocation data object for all programs and kernel

kernel await / fire event: add code to wait for specific event

refactor syscall.c

add sleep function to PIT driver

print basic XHCI information

add await syscall

check if a message should be printed to the main vga screen by checking if any syscall in the 'syscall stack' is the foreground process

add system call to look up the names of functions

add basic stack tracing ability

fix interrupts occuring while in user mode

rename service proivder to service function ...

now matches the documentation in the wiki

free stack of unused system call processes ...

saves about 1/2 of previously used memory

add kernel events ...

kernel events get triggered by the kernel when certain things happen.
first example: log a message whenever a new programm is loaded from the initrd

add an additional argument to request calls

make malloc functions accessible to user mode programs

add system call to request memory ...

print hi to vga screen

move memset to memutil

use string identifiers for events ...

(some rework of the string saving system was required)

use stringmap for communication between processes

add stringmap insert and read length functions

mov syscall handlers to different files

add events

add a static libary and fix interrupts

enable subscribing to an interrupt and set up the PIC

enable interrupts

enable freeing of memory

add passing data to a syscall

add the ability to create multiple services and repair inter-service communication

add port IO syscalls