Write `get-file` and commands to get the list of blocks from another node

Description

This closes #1 (closed) by providing an API that allows to get a file with just its hash

Detailed list of changes

• add get_file, get_blocks_info_from and other things related to managing the filesystem
• add new commands to nu API
• remove DragoonBehaviour as it was not useful
• add two new tests for get_file and change the already existing test to use the new API

Note

The get_file is still very rough, the error management needs to be handled better to take into a lot more cases of failure

src/commands.rs

@@ -140,6 +140,9 @@ pub(crate) enum DragoonCommand {
         multiaddr: String,
         sender: Sender<u64>,
     },
+    NodeInfo {
+        sender: Sender<PeerId>,
+    },
     RemoveListener {
         listener_id: u64,
         sender: Sender<bool>,
@@ -172,6 +175,7 @@ impl std::fmt::Display for DragoonCommand {
             DragoonCommand::GetNetworkInfo { .. } => write!(f, "get-network-info"),
             DragoonCommand::GetProviders { .. } => write!(f, "get-providers"),
             DragoonCommand::Listen { .. } => write!(f, "listen"),
+            DragoonCommand::NodeInfo { .. } => write!(f, "node-info"),
             DragoonCommand::RemoveListener { .. } => write!(f, "remove-listener"),
             DragoonCommand::StartProvide { .. } => write!(f, "start-provide"),
         }
@@ -398,6 +402,11 @@ pub(crate) async fn create_cmd_listen(
     dragoon_command!(state, Listen, multiaddr)
 }
 
+pub(crate) async fn create_cmd_node_info(State(state): State<Arc<AppState>>) -> Response {
+    info!("running command `node_info`");
+    dragoon_command!(state, NodeInfo)
+}
+
 pub(crate) async fn create_cmd_remove_listener(
     Path(listener_id): Path<u64>,
     State(state): State<Arc<AppState>>,