refactor(sensors): Sensor event channel data, resolution tweaks.

* Refactor sensor events to include channel data,
  necessary for prop split encoders, and avoiding duplicate calls,
  to fetch channel data twice, etc.
* More consistent behavior driver API.
* Allow setting triggers per resolution at the behavior level optionally.

app/include/zmk/events/sensor_event.h

@@ -6,12 +6,21 @@
 
 #pragma once
 
-#include <zephyr/kernel.h>
+
+#include <zephyr/drivers/sensor.h>
 #include <zmk/event_manager.h>
-#include <zephyr/device.h>
+#include <zmk/sensors.h>
+#include <device.h>
+
+// TODO: Move to Kconfig when we need more than one channel
+#define ZMK_SENSOR_EVENT_MAX_CHANNELS 1
+
 struct zmk_sensor_event {
-    uint8_t sensor_number;
-    const struct device *sensor;
+    uint8_t sensor_position;
+
+    size_t channel_data_size;
+    struct zmk_sensor_channel_data channel_data[ZMK_SENSOR_EVENT_MAX_CHANNELS];
+
     int64_t timestamp;
 };