refactor: rule CRUD

ajax/backend/rules/delete.php

ajax/backend/rules/update.php

bin/backend/classes/ShippingRules.js

bin/backend/controls/Shipping.js

bin/backend/controls/shippingRules/Rule.js

bin/backend/controls/shippingRules/ShippingRuleList.js

bin/images/default.png

locale.xml

src/QUI/ERP/Shipping/Api/AbstractShippingEntry.php

src/QUI/ERP/Shipping/Api/AbstractShippingType.php

src/QUI/ERP/Shipping/Api/ShippingTypeInterface.php

src/QUI/ERP/Shipping/Methods/Standard/ShippingType.php

src/QUI/ERP/Shipping/Order/Shipping.html

src/QUI/ERP/Shipping/Order/Shipping.php

src/QUI/ERP/Shipping/Rules/ShippingRule.php

src/QUI/ERP/Shipping/Shipping.php

src/QUI/ERP/Shipping/Types/Factory.php

src/QUI/ERP/Shipping/Types/ShippingEntry.php