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/main.rs

@@ -73,8 +73,8 @@ pub(crate) async fn main() -> Result<(), Box<dyn Error>> {
             get(commands::create_cmd_encode_file),
         )
         .route("/get-block-from/:peer_id_base_58/:file_hash/:block_hash", get(commands::create_cmd_get_block_from))
-        .route("/get-file/:file_hash", get(commands::create_cmd_get_file))
-        .route("get-block-list/:file_hash/:output_filename:/powers_path", get(commands::create_cmd_get_block_list))
+        .route("/get-file/:file_hash/:output_filename:/powers_path", get(commands::create_cmd_get_file))
+        .route("get-block-list/:file_hash", get(commands::create_cmd_get_block_list))
         .route("get-blocks-info-from/:peer_id_base_58/:file_hash", get(commands::create_cmd_get_blocks_info_from));
 
     let router = router.with_state(Arc::new(app::AppState::new(cmd_sender)));