feat: #11

ajax/backend/rules/settings/getUnitFieldSetting.php

ajax/backend/rules/settings/getUnitFields.php

bin/backend/classes/ShippingRules.js

bin/backend/controls/settings/RuleFields.js

bin/backend/controls/shippingRules/CreateRule.html

bin/backend/controls/shippingRules/CreateRule.js

bin/backend/controls/shippingRules/Rule.html

bin/backend/controls/shippingRules/Rule.js

bin/backend/controls/shippingRules/RuleUnit.html

database.xml

locale.xml

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

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

src/QUI/ERP/Shipping/Shipping.php