feat(protocol): 添加键盘协议功能支持

添加了完整的键盘协议功能，包括：
- 新增多个事件类型：cdc_proto_tx_event、function_bitmap_update_event、key_function_event
- 在CMakeLists.txt中注册新的事件源文件
- 扩展keyboard_core.h定义键盘协议相关宏
- 增强protocol_module.h定义协议消息类型常量
- 更新protobuf定义device_comm.proto添加Bitmap、FunctionKeyEvent、Ack、Error消息
- 实现CDC协议包装器模块处理协议消息传输
- 改进键盘核心模块实现按键功能映射和位图管理
- 添加协议模块处理Hello、Bitmap、FunctionKeyEvent等协议消息
- 实现USB设备状态管理和错误响应机制

src/events/cdc_proto_tx_event.c

@@ -0,0 +1,29 @@
+#include "cdc_proto_tx_event.h"
+
+static void log_cdc_proto_tx_event(const struct app_event_header *aeh)
+{
+	const struct cdc_proto_tx_event *event = cast_cdc_proto_tx_event(aeh);
+
+	APP_EVENT_MANAGER_LOG(aeh, "type:0x%02x len:%zu",
+			      event->type, event->dyndata.size);
+}
+
+static void profile_cdc_proto_tx_event(struct log_event_buf *buf,
+				       const struct app_event_header *aeh)
+{
+	const struct cdc_proto_tx_event *event = cast_cdc_proto_tx_event(aeh);
+
+	nrf_profiler_log_encode_uint8(buf, event->type);
+	nrf_profiler_log_encode_uint8(buf, (uint8_t)event->dyndata.size);
+}
+
+APP_EVENT_INFO_DEFINE(cdc_proto_tx_event,
+		      ENCODE(NRF_PROFILER_ARG_U8, NRF_PROFILER_ARG_U8),
+		      ENCODE("type", "len"),
+		      profile_cdc_proto_tx_event);
+
+APP_EVENT_TYPE_DEFINE(cdc_proto_tx_event,
+		      log_cdc_proto_tx_event,
+		      &cdc_proto_tx_event_info,
+		      APP_EVENT_FLAGS_CREATE(
+			      APP_EVENT_TYPE_FLAGS_INIT_LOG_ENABLE));

src/events/function_bitmap_update_event.c

@@ -0,0 +1,24 @@
+#include "function_bitmap_update_event.h"
+
+static void log_function_bitmap_update_event(const struct app_event_header *aeh)
+{
+	APP_EVENT_MANAGER_LOG(aeh, "bitmap updated");
+}
+
+static void profile_function_bitmap_update_event(struct log_event_buf *buf,
+						 const struct app_event_header *aeh)
+{
+	ARG_UNUSED(buf);
+	ARG_UNUSED(aeh);
+}
+
+APP_EVENT_INFO_DEFINE(function_bitmap_update_event,
+		      ENCODE(),
+		      ENCODE(),
+		      profile_function_bitmap_update_event);
+
+APP_EVENT_TYPE_DEFINE(function_bitmap_update_event,
+		      log_function_bitmap_update_event,
+		      &function_bitmap_update_event_info,
+		      APP_EVENT_FLAGS_CREATE(
+			      APP_EVENT_TYPE_FLAGS_INIT_LOG_ENABLE));

src/events/key_function_event.c

@@ -0,0 +1,43 @@
+#include "key_function_event.h"
+
+static const char *action_name(uint8_t action)
+{
+	switch (action) {
+	case KEY_FUNCTION_ACTION_RELEASE:
+		return "release";
+
+	case KEY_FUNCTION_ACTION_PRESS:
+		return "press";
+
+	default:
+		return "unknown";
+	}
+}
+
+static void log_key_function_event(const struct app_event_header *aeh)
+{
+	const struct key_function_event *event = cast_key_function_event(aeh);
+
+	APP_EVENT_MANAGER_LOG(aeh, "usage:0x%04x action:%s",
+			      event->usage, action_name(event->action));
+}
+
+static void profile_key_function_event(struct log_event_buf *buf,
+				       const struct app_event_header *aeh)
+{
+	const struct key_function_event *event = cast_key_function_event(aeh);
+
+	nrf_profiler_log_encode_uint16(buf, event->usage);
+	nrf_profiler_log_encode_uint8(buf, event->action);
+}
+
+APP_EVENT_INFO_DEFINE(key_function_event,
+		      ENCODE(NRF_PROFILER_ARG_U16, NRF_PROFILER_ARG_U8),
+		      ENCODE("usage", "action"),
+		      profile_key_function_event);
+
+APP_EVENT_TYPE_DEFINE(key_function_event,
+		      log_key_function_event,
+		      &key_function_event_info,
+		      APP_EVENT_FLAGS_CREATE(
+			      APP_EVENT_TYPE_FLAGS_INIT_LOG_ENABLE));