Implement a stream of blocks API, and expose it's usage through async fn

[oleonardolima]

Description:

Using the mempool.space client, extract the current WebSocket integration to use a common configuration module with tokio-tungestenite and the mempool.space client + API, and expose it as an initial async fn returning a stream of BlockHeader data ex.: <BlockHash, BlockHeight ...>

Resources:

• rust async: https://rust-lang.github.io/async-book/
• tokio async tutorial: https://tokio.rs/tokio/tutorial