Add new FabCar contract sample using the new programming model, written
in TypeScript. Add the new contract sample alongside the existing one
written in the old programming model, which will be removed in a subsequent
change request.
Change-Id: I47e5f16b475c68f9a1c4752af2623f090fbf12c9
Signed-off-by: Simon Stone <sstone1@uk.ibm.com>
