Added:

- TTY driver
- VGA driver
- kernel's main function
- Makefiles

*NOTE*: iceOS not works at this stage.

kernel/kernel_main.c

@@ -0,0 +1,9 @@
+#include "drivers/tty.h"
+#include "libc/stdio.h"
+
+void kernel_main() {
+    clear_prompt();
+    init_prompt();
+
+    puts("Hello World!");
+}