aquatic_ws_protocol: refactor, moving code into submodules

aquatic_ws_protocol/src/response/offer.rs

@@ -0,0 +1,19 @@
+use serde::{Deserialize, Serialize};
+
+use crate::common::*;
+
+/// Apparently, these are sent to a number of peers when they are set
+/// in an AnnounceRequest
+/// action = "announce"
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+pub struct MiddlemanOfferToPeer {
+    pub action: AnnounceAction,
+    /// Peer id of peer sending offer
+    /// Note: if equal to client peer_id, client ignores offer
+    pub peer_id: PeerId,
+    pub info_hash: InfoHash,
+    /// Gets copied from AnnounceRequestOffer
+    pub offer: JsonValue,
+    /// Gets copied from AnnounceRequestOffer
+    pub offer_id: OfferId,
+}