feat(events): 添加传输策略事件支持

添加了新的 transport_policy_event 事件类型，用于管理 HID
传输策略和蓝牙配置文件策略。该事件包含源模式、HID 传输策
略和蓝牙配置文件策略三个枚举值，并提供了相应的提交函数
和日志记录功能。

BREAKING CHANGE: 将原有的 mode_switch_event 替换为更具体的
transport_policy_event，相关模块需要更新以使用新的事件类
型。

src/events/transport_policy_event.c

@@ -0,0 +1,78 @@
+#include "transport_policy_event.h"
+
+static const char *source_mode_name(enum mode_switch_mode mode)
+{
+	switch (mode) {
+	case MODE_SWITCH_USB:
+		return "USB";
+	case MODE_SWITCH_BLE:
+		return "BLE";
+	case MODE_SWITCH_24G:
+		return "24G";
+	default:
+		return "?";
+	}
+}
+
+static const char *hid_transport_policy_name(enum hid_transport_policy transport)
+{
+	switch (transport) {
+	case HID_TRANSPORT_POLICY_NONE:
+		return "none";
+	case HID_TRANSPORT_POLICY_USB:
+		return "usb";
+	case HID_TRANSPORT_POLICY_BLE:
+		return "ble";
+	default:
+		return "?";
+	}
+}
+
+static const char *ble_profile_policy_name(enum ble_profile_policy profile)
+{
+	switch (profile) {
+	case BLE_PROFILE_POLICY_NONE:
+		return "none";
+	case BLE_PROFILE_POLICY_GENERAL:
+		return "general";
+	case BLE_PROFILE_POLICY_DONGLE:
+		return "dongle";
+	default:
+		return "?";
+	}
+}
+
+static void log_transport_policy_event(const struct app_event_header *aeh)
+{
+	const struct transport_policy_event *event =
+		cast_transport_policy_event(aeh);
+
+	APP_EVENT_MANAGER_LOG(aeh, "source:%s hid:%s ble:%s",
+			      source_mode_name(event->source_mode),
+			      hid_transport_policy_name(event->hid_transport),
+			      ble_profile_policy_name(event->ble_profile));
+}
+
+static void profile_transport_policy_event(struct log_event_buf *buf,
+					   const struct app_event_header *aeh)
+{
+	const struct transport_policy_event *event =
+		cast_transport_policy_event(aeh);
+
+	nrf_profiler_log_encode_uint8(buf, event->source_mode);
+	nrf_profiler_log_encode_uint8(buf, event->hid_transport);
+	nrf_profiler_log_encode_uint8(buf, event->ble_profile);
+}
+
+APP_EVENT_INFO_DEFINE(transport_policy_event,
+		      ENCODE(NRF_PROFILER_ARG_U8, NRF_PROFILER_ARG_U8,
+			     NRF_PROFILER_ARG_U8),
+		      ENCODE("source_mode", "hid_transport", "ble_profile"),
+		      profile_transport_policy_event);
+
+APP_EVENT_TYPE_DEFINE(transport_policy_event,
+		      log_transport_policy_event,
+		      &transport_policy_event_info,
+		      APP_EVENT_FLAGS_CREATE(
+			      IF_ENABLED(CONFIG_BRIDGE_LOG_TRANSPORT_POLICY_EVENT,
+					 (APP_EVENT_TYPE_FLAGS_INIT_LOG_ENABLE))));