Add feature flag for conditional compilation of protocols (TCP, QUIC, HTTP)

[hubcio]

So the out-binary (or library) can be smaller.

[spetz]

This could be applied to the server, as well as to iggy SDK as the set of additional features.

[raywu-hk]

I would like to work on it if no one taken

[raywu-hk]

websocket seem added recently, websocket should include?

[raywu-hk]

SenderKind does not got http impl, but http had transitive depends on SenderKind, http -> user -> SenderKind, any idea how could we approach?

[hubcio]

hey @raywu-hk, i assigned this issue to you. have you already joined to our discord? i think this can be split into 2 features, one is SDK (more important), other one is server. yes, websockets should be also included. regarding SenderKind no idea, feel free to refactor the code around so that it has unified approach.