Reorganize directory structures

Signed-off-by: Sean Du <do4suki@gmail.com>

internal/handler/payment.go

@@ -0,0 +1,39 @@
+package handler
+
+import (
+	"encoding/json"
+	"honoka-chan/internal/model"
+	"honoka-chan/internal/utils"
+	"net/http"
+	"time"
+
+	"github.com/gin-gonic/gin"
+)
+
+func ProductList(ctx *gin.Context) {
+	prodReesp := model.ProductResp{
+		ResponseData: model.ProductRes{
+			RestrictionInfo: model.RestrictionInfo{
+				Restricted: false,
+			},
+			UnderAgeInfo: model.UnderAgeInfo{
+				BirthSet:    true,
+				HasLimit:    false,
+				LimitAmount: nil,
+				MonthUsed:   0,
+			},
+			SnsProductList:   []any{},
+			ProductList:      []any{},
+			SubscriptionList: []any{},
+			ShowPointShop:    true,
+			ServerTimestamp:  time.Now().Unix(),
+		},
+		ReleaseInfo: []any{},
+		StatusCode:  200,
+	}
+	resp, err := json.Marshal(prodReesp)
+	utils.CheckErr(err)
+
+	ctx.Header("X-Message-Sign", utils.GenXMS(resp))
+	ctx.String(http.StatusOK, string(resp))
+}