refactor(common): 重构宠物相关信息结构

- 修改 PetInfo 和 PetEffectInfo 结构体，统一字段命名规范
- 更新 SkillInfo 结构体，增加技能等级字段
- 删除未使用的 LoginUserInfo 和 ServerInfo 结构体
- 引入 google/uuid 包，用于后续可能的唯一标识生成

common/core/info/user/SystemMessageOutboundInfo.java

@@ -0,0 +1,29 @@
+package org.nieo.seerproject.common.net.info.user;
+
+import lombok.Builder;
+import lombok.Data;
+import org.nieo.seerproject.common.annotations.FieldDescription;
+import org.nieo.seerproject.common.annotations.OutboundMessageType;
+import org.nieo.seerproject.common.annotations.serialize.ArraySerialize;
+import org.nieo.seerproject.common.annotations.serialize.AutoCodec;
+import org.nieo.seerproject.common.annotations.serialize.UInt;
+import org.nieo.seerproject.common.annotations.serialize.UShort;
+import org.nieo.seerproject.common.net.MessageCommandIDRegistry;
+import org.nieo.seerproject.common.net.OutboundMessage;
+import org.nieo.seerproject.common.net.serialize.ArraySerializeType;
+
+@Data
+@AutoCodec
+@Builder
+@OutboundMessageType(MessageCommandIDRegistry.System_Message)
+public class SystemMessageOutboundInfo implements OutboundMessage {
+	@FieldDescription("参数未知默认为0")
+	private @UShort short type;
+	@FieldDescription("npc的id 0无npc 1船长 7博士")
+	private @UShort short npc;
+	@FieldDescription("消息时间, 当前的时间戳")
+	private @UInt long msgTime;
+	@FieldDescription("消息体")
+	@ArraySerialize(value = ArraySerializeType.LENGTH_FIRST)
+	private String msg;
+}