init: hgmj server initial commit

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

models/v/imgroupmembermod/app.go

@@ -0,0 +1,15 @@
+package imgroupmembermod
+
+import (
+	"time"
+
+	"go.mongodb.org/mongo-driver/bson/primitive"
+)
+
+// ImGroupMemberInfo 移动端返回内容
+type ImGroupMemberInfo struct {
+	ID        primitive.ObjectID `json:"id"`        // 文档id
+	Uid       uint64             `json:"uid"`       // uid
+	Price     int64              `json:"price"`     // 进群花费价格
+	CreatedAt time.Time          `json:"createdAt"` // 创建时间
+}