And graphql search with pagination.

server/src/nm.rs

@@ -7,7 +7,7 @@ pub fn threadset_to_messages(
     thread_set: notmuch::ThreadSet,
 ) -> Result<Vec<Message>, error::ServerError> {
     for t in thread_set.0 {
-        for tn in t.0 {}
+        for _tn in t.0 {}
     }
     Ok(Vec::new())
 }