feat(drivers): add PS/2 keyboard driver

include/keyboard.h

@@ -0,0 +1,11 @@
+#ifndef FROSTBYTE_KEYBOARD_H
+#define FROSTBYTE_KEYBOARD_H
+
+#include "types.h"
+
+void keyboardInit(void);
+void keyboardHandler(void);
+bool keyboardHasChar(void);
+char keyboardReadChar(void);
+
+#endif