[ BIG CHANGE ] Properly Implemented IDT

- New include files: idt.h, pic.h, syscall.h and exceptions.h
- Proper exception handling (still could be improved
- PIC properly initiated and irqs all masked
- BREAKS Keyboard - The keyboard IRQ is not handled anymore
- convertColor() is kinda broken :/ (More in README.md)

include/keyboard.h

@@ -1,8 +1,8 @@
 #ifndef KEYBOARD_H
 #define KEYBOARD_H
 
-#include "irq.h"
 #include "idt.h"
+#include "pic.h"
 #include "system.h"
 #include "screen.h"
 #include "stdint.h"
@@ -92,7 +92,8 @@ char* read(char terminator) {
 }
 
 void setupKeyboard() {
-    installIrqHandler(1, keyboardHandler);
+    idtSetGate(33, keyboardHandler, INT_GATE_FLAGS);
+    setIrqMask(1);
 }
 
 #endif