core: change types from uint32_t to u32 (e.g)

headers/keyboard.h

@@ -1,5 +1,6 @@
 #pragma once
 
+#include "types.h"
 #include <stddef.h>
 #include <stdint.h>
 
@@ -116,8 +117,8 @@
 #define KEY_CAPSLOCK             0x3A
 
 struct key_event {
-	uint8_t c;
-	uint8_t scan_code;
+	u8 c;
+	u8 scan_code;
 };
 
 struct key_event get_key(void);