Feat: file transfer, resume (#12557)

Signed-off-by: fufesou <linlong1266@gmail.com>

src/ipc.rs

@@ -26,7 +26,9 @@ use hbb_common::{
     config::{self, keys::OPTION_ALLOW_WEBSOCKET, Config, Config2},
     futures::StreamExt as _,
     futures_util::sink::SinkExt,
-    log, password_security as password, timeout,
+    log,
+    message_proto::FileTransferSendConfirmRequest,
+    password_security as password, timeout,
     tokio::{
         self,
         io::{AsyncRead, AsyncWrite},
@@ -105,6 +107,7 @@ pub enum FS {
         last_modified: u64,
         is_upload: bool,
     },
+    SendConfirm(Vec<u8>),
     Rename {
         id: i32,
         path: String,