Documentation lacking information about freight shipments

Hello there,

I've been using the gabrielbull/php-ups-api package for some time now, and I have been really impressed with its functionality. However, I have noticed that the documentation does not provide any information about handling freight shipments.

I have found that the package contains entities such as FreightCharges.php and FreightCollect.php, but I'm not sure how to properly use them.

As someone who relies on this package for my shipping needs, I would really appreciate it if someone could provide some guidance on how to handle freight shipments using this package.

Thank you in advance for your help.

Start by reading FreightCharges.php and FreightCollect.php to understand the freight-shipment entities and how the package exposes them. Document the supported usage and required information, with the work complete when users can understand how to handle freight shipments from the documentation.

Written by the indexing model from the issue text.