Added kafka-console-share-consumer.sh which will start a share consumer on a share group.
This tool helps to read data from Kafka topics using share groups and outputs it to standard output.
Reviewers: Andrew Schofield <aschofield@confluent.io>, Apoorv Mittal <apoorvmittal10@gmail.com>, Manikumar Reddy <manikumar.reddy@gmail.com>