feat(static df to list/stream): adding support to write dataframes to…

[ssvargass]

… list or Streams

adding support to write dataframes to list or Streams

[chayim]

@sazzad16 WDYT about this sort of thing?

[sazzad16]

@chayim The feature is considerable. But I'm concerned about this approach.

• The class name is HashRedisPersistence. Doing something that's not related to Hash, i.e. List and Stream, doesn't look like a good solution.
• It literally added a dependency (gson) to support one line. I don't know the scala world's take on it and the aims and considerations of this library. So I'm not sure about it.