Implement IDT

[Periecle]

What should be done

The Interrupt Descriptor Table (IDT) is a binary data structure specific to the IA-32 and x86-64 architectures. It is the Protected Mode and Long Mode counterpart to the Real Mode Interrupt Vector Table (IVT) telling the CPU where the Interrupt Service Routines (ISR) are located (one per interrupt vector). It is similar to the Global Descriptor Table in structure.

Motivation

IDT is a prerequisite for writing interrupt handlers for handling exceptions and working with devices.
Make sure that GDT has been set up correctly!