feat: SDK for using filter/lightpush

[chair28980]

Filter relies in many ways on the same building blocks as relay for its reliability, but in a modular, "pick your own tradeoffs" way:

• redundancy (for relay in full message connections, for filter in subscriptions)
• randomness (selecting random peers for connection/subscription, preferably with some peer cycling)
• periodically checking that you received all messages against a cache (this doesn't really exist yet for filter, but you could imagine using occasional store queries to achieve something similar)

As such it will be helpful to provide a configurable "reliability" SDK on top of filter for projects without the capacity to build these features from the ground up with filter.

Priority: not critical for launch

[fryorcraken]

Where does this come from? Seems like a dupe of #1463

[chair28980]

@fryorcraken Looks like its a task under 2.1 here waku-org/research#3 under the task breakdown comment.

[chair28980]

@fryorcraken let me know if #1463 should replace this issue

[fryorcraken]

superseded by #1463