feat(behaviors): Add macro support.

* Fine grainted press/release/tap actions.
* TIming between actions can be controlled.
* Processed async, to avoid blocking.

app/include/zmk/behavior_queue.h

@@ -0,0 +1,14 @@
+/*
+ * Copyright (c) 2022 The ZMK Contributors
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#pragma once
+
+#include <kernel.h>
+#include <stdint.h>
+#include <zmk/behavior.h>
+
+int zmk_behavior_queue_add(uint32_t position, const struct zmk_behavior_binding behavior,
+                           bool press, uint32_t wait);