Strategies for the send protocol

Description

This builds on top of the previous block-per-block exchange protocol by taking a list of blocks and allowing the choice of which peer to send each block to based on a strategy.

We implement two strategies on the trait, which are Random and Round-Robin.

src/dragoon_network.rs

@@ -1533,7 +1533,7 @@ where {
                     accepted_peers.remove(index); //using swap_remove would mess up the order and doesn't ensure all peers get an equivalent number of blocks
                     match accepted_peers_index.checked_sub(1) {
                         Some(res) => *accepted_peers_index = res,
-                        None => {},
+                        None => {}
                     };
                 } else {
                     debug!(