[trade] Add sorting to /trade view

[imtherealF1]

Self-hosting

Official Ballsdex bot

Description

Would add an arg for sorting, the exact same sorting as /trade bulk add and /balls list, SortingChoices. Maybe should wait until #559 is finished.

(This is from a suggestion from the official server, https://discord.com/channels/1049118743101452329/1344394793823764591)