feature: start to implement keyboard handler and better isrs/irqs

src/drivers/clock.c

@@ -0,0 +1,8 @@
+#include "interrupts.h"
+#include "kprintf.h"
+
+void clock_handler(struct registers *regs)
+{
+	(void)regs;
+	kprintf("test\n");
+}

src/drivers/drivers.c

@@ -0,0 +1,8 @@
+#include "drivers.h"
+#include "interrupts.h"
+
+void load_drivers(void)
+{
+	register_interrupt_handler(1, keyboard_handler);
+	register_interrupt_handler(0, clock_handler);
+}

src/drivers/keyboard.c

@@ -0,0 +1,10 @@
+#include "interrupts.h"
+#include "kprintf.h"
+#include "terminal.h"
+#include <stdint.h>
+
+void keyboard_handler(struct registers *regs)
+{
+	(void)regs;
+	terminal_putchar(terminal_getkey().c);
+}