I have been using Chirp for my Wouxun KG-UV3D (quite successfully) and am trying to use my radio as a packet station. One of the missing components is a working hamlib configuration. I was hoping someone can point me towards some resources on the Wouxun CAT commands so that I can work with the hamlib folks to get this working. I looked through the Chirp Wouxun-specific source code files, but it's a bit tough for me to decipher.

Those radios don't support anything like the CAT interface. They have a very rudimentary memory dump capability for programming and that's it.

Use of your radio as a packet station is definitely off-topic for this list, but FWIW, hamlib shouldn't have anything to do with it.