feat: 添加HID流控制模块和相关事件处理

- 添加hid_flowctrl_module.c实现HID报告流控制功能，包括FIFO队列管理和
  报告发送控制
- 新增hid_report_sent_event、hid_transport_state_event和
  hid_tx_report_event事件类型及其对应的头文件和实现
- 在CMakeLists.txt中注册新模块和事件源文件
- 修改keyboard_core_module.c以支持队列策略，并添加编码器事件处理逻辑
- 更新usb_hid_module.c将直接的键盘HID报告事件改为通过
  hid_tx_report_event进行传输，并添加状态报告事件
- 在keyboard_hid_report_event中增加queue_policy字段以支持不同
  队列策略

src/events/keyboard_hid_report_event.c

@@ -42,6 +42,18 @@ static const char *protocol_mode_name(enum keyboard_protocol_mode protocol_mode)
 	}
 }
 
+static const char *queue_policy_name(enum hid_queue_policy queue_policy)
+{
+	switch (queue_policy) {
+	case HID_QUEUE_POLICY_LATEST:
+		return "latest";
+	case HID_QUEUE_POLICY_FIFO:
+		return "fifo";
+	default:
+		return "?";
+	}
+}
+
 static void log_keyboard_hid_report_event(const struct app_event_header *aeh)
 {
 	const struct keyboard_hid_report_event *event =
@@ -49,10 +61,12 @@ static void log_keyboard_hid_report_event(const struct app_event_header *aeh)
 	char log_buf[KEYBOARD_HID_REPORT_EVENT_LOG_BUF_LEN];
 	int pos;
 
-	pos = snprintf(log_buf, sizeof(log_buf), "mode:%s type:%s protocol:%s len:%zu",
+	pos = snprintf(log_buf, sizeof(log_buf),
+		       "mode:%s type:%s protocol:%s queue:%s len:%zu",
 		       mode_name(event->mode),
 		       report_type_name(event->report_type),
 		       protocol_mode_name(event->protocol_mode),
+		       queue_policy_name(event->queue_policy),
 		       event->dyndata.size);
 	if ((pos > 0) && (pos < sizeof(log_buf))) {
 		for (size_t i = 0; i < event->dyndata.size; i++) {
@@ -89,15 +103,17 @@ static void profile_keyboard_hid_report_event(struct log_event_buf *buf,
 	nrf_profiler_log_encode_uint8(buf, event->mode);
 	nrf_profiler_log_encode_uint8(buf, event->report_type);
 	nrf_profiler_log_encode_uint8(buf, event->protocol_mode);
+	nrf_profiler_log_encode_uint8(buf, event->queue_policy);
 	nrf_profiler_log_encode_uint8(buf, (uint8_t)event->dyndata.size);
 }
 
 APP_EVENT_INFO_DEFINE(keyboard_hid_report_event,
 		      ENCODE(NRF_PROFILER_ARG_U8,
+			     NRF_PROFILER_ARG_U8,
 			     NRF_PROFILER_ARG_U8,
 			     NRF_PROFILER_ARG_U8,
 			     NRF_PROFILER_ARG_U8),
-		      ENCODE("mode", "report_type", "protocol_mode", "len"),
+		      ENCODE("mode", "report_type", "protocol_mode", "queue_policy", "len"),
 		      profile_keyboard_hid_report_event);
 
 APP_EVENT_TYPE_DEFINE(keyboard_hid_report_event,