[WHO] Implement The Five Doctors

[padfoothelix]

Implement [[The Five Doctors]].

Part of #10653.

Card was tested and seems to work as intended.

Note that the searchLibrary method means that you have to click "done" twice when you're done searching cards from your library if you want to stop before the max number of targets. I'm not sure why that is.

I used code from the common SearchLibraryGraveyardPutInHandEffect, but I had to change the graveyard search logic from controller.choose to controller.chooseTarget, otherwise you can't choose more than one card.

As always, thanks for your work !