init RSS framework

[richox]

add RSS framework, for easier cooperating with 3rdparty remote shuffle service.

for supporting a new 3rdparty RSS serivice, one needs to:

1. implement an RssPartitionWriter derived from RssPartitionWriterBase, which writes encoded columnar data to a specified shuffled partition.
2. implement an RssShuffleWriter derived from BlazeRssShuffleWriterBase, which creates instances of RssPartitionWriter.
3. implement an RssShuffleReader derived from BlazeRssShuffleReaderBase, which implements reading columnar/unsafe row data of specified shuffle, partition and maps.
4. implement an RssShuffleManager derived from BlazeRssShuffleManagerBase, which registers/unregisters a shuffle, and cooperates with RssShuffleWriter/Reader.