feat (postal-code): add crud for postal-code

internal/domain/main-entities/postal-code/base/entity.go

@@ -5,3 +5,7 @@ type Basic struct {
 	Village_Code string `json:"village_code" gorm:"size:10"`
 	Code         string `json:"code" gorm:"unique;size:5"`
 }
+
+func (Basic) TableName() string {
+	return "PostalCode"
+}