[FAB-18034] Improve FabCar docs with better context, Fix queryAllCars description
[FAB-18034] Improve FabCar docs with better context, Fix queryAllCars description

Signed-off-by: Sijo Cherian <df66aa2075ca1875f7832b6cdf9c23f683c2ad82@ibm.com>

stemlending/fabric,manish-sethi/fabric-sidedb,manish-sethi/fabric-sidedb,manish-sethi/fabric-sidedb,manish-sethi/fabric-sidedb,manish-sethi/fabric,hyperledger/fabric,hyperledger/fabric,jimthematrix/fabric,manish-sethi/fabric-sidedb,manish-sethi/fabric,jimthematrix/fabric,manish-sethi/fabric-sidedb,stemlending/fabric,manish-sethi/fabric-sidedb,stemlending/fabric,stemlending/fabric