feat: Exposing the rsync that we have to the js (#1907)

chore: Make the commit do by checksum.

chore: Remove the logging at the start

chore: use the defaults of the original.

chore: Convert the error into just the source.

chore: Remove some of the unwraps

backend/src/util/io.rs

@@ -295,31 +295,3 @@ impl AsyncRead for BufferedWriteReader {
         }
     }
 }
-
-#[pin_project::pin_project]
-pub struct ByteReplacementReader<R> {
-    pub replace: u8,
-    pub with: u8,
-    #[pin]
-    pub inner: R,
-}
-impl<R: AsyncRead> AsyncRead for ByteReplacementReader<R> {
-    fn poll_read(
-        self: std::pin::Pin<&mut Self>,
-        cx: &mut std::task::Context<'_>,
-        buf: &mut ReadBuf<'_>,
-    ) -> std::task::Poll<std::io::Result<()>> {
-        let this = self.project();
-        match this.inner.poll_read(cx, buf) {
-            Poll::Ready(Ok(())) => {
-                for idx in 0..buf.filled().len() {
-                    if buf.filled()[idx] == *this.replace {
-                        buf.filled_mut()[idx] = *this.with;
-                    }
-                }
-                Poll::Ready(Ok(()))
-            }
-            a => a,
-        }
-    }
-}