feat(hero): 新增英雄相关接口和功能

- 新增英雄信息获取接口和相关逻辑
- 实现英雄列表和详情查询功能- 添加英雄相关数据结构和VO对象
- 更新项目结构，移除不必要的文件

internal/logic/hero/hero.go

@@ -0,0 +1,103 @@
+package hero
+
+import (
+	"context"
+	v1 "epic/api/hero/v1"
+	"epic/internal/dao"
+	"epic/internal/model/entity"
+	"epic/internal/service"
+	"github.com/gogf/gf/v2/frame/g"
+)
+
+type Logic struct{}
+
+func New() *Logic {
+	return &Logic{}
+}
+
+func init() {
+	service.SetHero(New())
+}
+
+// GetHeroByCode 根据 code 获取英雄信息
+func (l *Logic) GetHeroByCode(ctx context.Context, code string) (*entity.EpicHeroInfo, error) {
+
+	// 2. 缓存未命中，查数据库
+	var hero *entity.EpicHeroInfo
+	err := dao.EpicHeroInfo.Ctx(ctx).
+		Where(dao.EpicHeroInfo.Columns().HeroCode, code).
+		Scan(&hero)
+	if err != nil {
+		return nil, err
+	}
+
+	return hero, nil
+}
+
+// GetHeroList 查询所有英雄信息，并按创建时间倒序排列
+func (l *Logic) GetHeroList(ctx context.Context) ([]*v1.EpicHeroVO, error) {
+	redis := g.Redis()
+	cacheKey := "hero:list"
+
+	// 1. 先查缓存
+	value, err := redis.Get(ctx, cacheKey)
+	if err == nil && !value.IsEmpty() {
+		var voList []*v1.EpicHeroVO
+		if err := value.Scan(&voList); err == nil {
+			return voList, nil
+		}
+	}
+
+	var (
+		doList []*entity.EpicHeroInfo // 数据库原始结构
+		voList []*v1.EpicHeroVO       // 要返回的视图结构
+	)
+
+	// 2. 缓存未命中，查数据库
+	err = dao.EpicHeroInfo.Ctx(ctx).
+		OrderDesc(dao.EpicHeroInfo.Columns().CreateTime). // 按创建时间倒序
+		Scan(&doList)
+	if err != nil {
+		return nil, err
+	}
+
+	// 3. 手动映射 DO -> VO
+	for _, hero := range doList {
+		voList = append(voList, &v1.EpicHeroVO{
+			Id:           hero.Id,
+			HeroName:     hero.HeroName,
+			HeroCode:     hero.HeroCode,
+			Attribute:    hero.Attribute,
+			HeadImgUrl:   hero.HeadImgUrl,
+			HeroAttrLv60: hero.HeroAttrLv60,
+			NickName:     hero.NickName,
+			Rarity:       hero.Rarity,
+			Role:         hero.Role,
+			Zodiac:       hero.Zodiac,
+			Remark:       hero.Remark,
+		})
+	}
+
+	return voList, nil
+}
+
+func (l *Logic) GetHeroDetailByCode(ctx context.Context, code string) (*v1.HeroDetailVO, error) {
+	//TODO implement me
+	panic("implement me")
+}
+
+// ClearHeroCache 清理英雄相关缓存
+func (l *Logic) ClearHeroCache(ctx context.Context, code string) error {
+	redis := g.Redis()
+
+	// 清理单个英雄缓存
+	if code != "" {
+		cacheKey := "hero:" + code
+		redis.Del(ctx, cacheKey)
+	}
+
+	// 清理英雄列表缓存
+	redis.Del(ctx, "hero:list")
+
+	return nil
+}