refactor: Move to zephyr/ include paths.

* Zephyr moved to properly namespaced headers, so major "rip
  the bandaid" commit to move us to those everywhere.

app/src/behavior_queue.c

@@ -6,8 +6,8 @@
 
 #include <zmk/behavior_queue.h>
 
-#include <kernel.h>
-#include <logging/log.h>
+#include <zephyr/kernel.h>
+#include <zephyr/logging/log.h>
 #include <drivers/behavior.h>
 
 LOG_MODULE_DECLARE(zmk, CONFIG_ZMK_LOG_LEVEL);