Implement first draft of raw write serverside

bffhd/capnp/machine.rs

@@ -173,12 +173,16 @@ impl InUseServer for Machine {
 
     fn send_raw_data(
         &mut self,
-        _: inuse::SendRawDataParams,
+        mut params: inuse::SendRawDataParams,
         _: inuse::SendRawDataResults,
     ) -> Promise<(), ::capnp::Error> {
-        Promise::err(::capnp::Error::unimplemented(
-            "method not implemented".to_string(),
-        ))
+        let data: Vec<u8> = pry!(pry!(params.get()).get_data()).to_vec();
+        let resource = self.resource.clone();
+        let session = self.session.clone();
+        Promise::from_future(async move {
+            resource.send_raw(data).await;
+            Ok(())
+        })
     }
 }