feat: cleanup init code, small other refactors

kernel/drivers/keyboard.c

@@ -8,6 +8,7 @@
 #include <myke/libc/ringqueue.h>
 #include <myke/libk/libk.h>
 #include <myke/libk/syscall.h>
+#include <myke/util/init.h>
 
 
 const char scancode_map_lowercase[] = {
@@ -131,7 +132,7 @@ static void keyboard_callback(isr_registers_t *regs) {
     publish_key_event(scancode);
 }
 
-void init_keyboard() {
+void keyboard_init() {
     register_interrupt_handler(IRQ1, keyboard_callback);
     keyboard_state.shift = 0;
     keyboard_state.ctrl = 0;
@@ -139,3 +140,9 @@ void init_keyboard() {
     keyboard_state.extended = 0;
     keyboard_event_buffer = create_buffer(256, sizeof(KeyEvent));
 }
+
+INIT_FUNCTION(100) = {
+        .name = "keyboard",
+        .stage = INIT_STAGE_LATE_BOOT,
+        .init = keyboard_init,
+};