It is my presure.

I hope you enjoy hacking zimbra.
I do not know much about jquery.
But from my understanding you can use third party
js library in your zimlet.
You can see that com_zimbra_ysearch zimlet.
It is just the matter of Namesapce.
If there is no namespace confliction, it should work.
In that zimlet you load the library with http directory from outside of zimbra at the runtime.
But also you download that in advance and deploy that in Zimbra so that you can use that just including that to zimlet's config xml file.