ZAP is a relatively large and complex tool.
It has a plugin architecture that allows you to dynamically download and install add-ons from the ZAP Marketplace.
I'm afraid we have no plans to create a single jar that would do what you want.
If there was significant interest in such a thing then we _could_ investigate how much work it might take, but I suspect it will be non trivial.
In other words dont get your hopes up ;)
Does anyone else have this requirement?
Cheers,
Simon