Added executable for kernel_parameters

Cybermage and Void both tested the code for adding kernel parameters. Cybermage tested with systemd-boot and I had to fix an error before it worked well for him (a string was not being initialized but that was a matter of changing strcat to strcpy. I had never tested on systemd-boot before this) but after the fix, it worked as intended for both Void and Cybermage. This was tested on an AMD, as well as Intel CPU and AMD, nVidia GPU - most of the hardware it is designed to work with. video=efifb:off is only added if the user has an AMDGPU driver running or is using noveau.