feat(pic): move pic.c in pic dir

k/Makefile

@@ -34,7 +34,7 @@ OBJS	= \
 	  gdt.o \
 	  idt.o \
 	  isr.o \
-	  pic.o \
+	  pic/pic.o \
 	  pic/keyboard.o \
 	  utils/ring_buffer.o
 

k/idt.c

@@ -1,6 +1,6 @@
 #include "idt.h"
 #include "stdio.h"
-#include "pic.h"
+#include "pic/pic.h"
 #include "io.h"
 #include "pic/keyboard.h"
 

k/k.c

@@ -26,7 +26,7 @@
 #include "gdt.h"
 #include "idt.h"
 #include "multiboot.h"
-#include "pic.h"
+#include "pic/pic.h"
 #include "serial.h"
 #include "stdio.h"