feat: add shelve management functionality

internal/models/shelve_model.go

@@ -0,0 +1,13 @@
+package models
+
+import "time"
+
+type Shelve struct {
+	ID          int64     `json:"id"`
+	CabinetID   int64     `json:"cabinetId"`
+	Name        string    `json:"name"`
+	LevelIndex  int32     `json:"levelIndex"`
+	Description string    `json:"description"`
+	CreatedAt   time.Time `json:"createdAt"`
+	UpdatedAt   time.Time `json:"updatedAt"`
+}