feat(fight): 实现精灵切换功能并优化战斗逻辑

- 新增 ChangePet 方法实现精灵切换
- 优化战斗循环逻辑，支持精灵切换
- 修复一些战斗相关的 bug
- 优化代码结构，提高可维护性

logic/controller/fight.go

@@ -83,3 +83,10 @@ func (h Controller) Escape(data *fight.EscapeFightInboundInfo, c *service.Player
 	c.FightC.Escape(c)
 	return nil, 0
 }
+
+// 切换精灵
+func (h Controller) ChangePet(data *fight.ChangePetInboundInfo, c *service.Player) (result *fight.NullOutboundInfo, err errorcode.ErrorCode) {
+
+	c.FightC.ChangePet(c, int32(data.CatchTime))
+	return nil, 0
+}