Initial commit. We have a booting kernel

kernel/include/kernel/tty.h

@@ -0,0 +1,8 @@
+#pragma once
+
+#include <stddef.h>
+
+void terminal_initialize(void);
+void terminal_putchar(char c);
+void terminal_write(const char* data, size_t size);
+void terminal_writestring(const char* data);