I hope to do something like that soon, but I will be clear, it is not high priority.
The new dice system will introduce a way to pick up text in list. For example, 1L[sword,spear,bow,knife,gun], the result will be one word.
This technique can be amend a bit to draw card: 1L[9 square,Ace of Heart..]. Right now, there will be no way to store state of card deck. So the probability won't be as it is in real life.
To get closer, We have to add the possibility to store the deck state. So, you will have to define your deck : L1=[Ace of Heart,King of Heart.....], the system will reorder the list ramdomly. Then when you draw cards, they will be picked up from the top of the list.
Implement that in the "dice system" should not be too difficult. It is poor, but it should be done.
I will say that card, is better to have images. So, the next step will be to propose a panel which show you the card and manage everything. That, will be longer to implement, moreover it is difficult to find free-to-use card pictures.
For plugin, it is not longer a priority, we focused on Vectorial Map, charactersheet and stand-alone server. If you (or one of your players) want to implement that module, I will be glad to add it in rolisteam.