Added CRDT snapshotting

crates/bft-json-crdt/src/lww_crdt.rs

@@ -7,6 +7,7 @@
 use crate::debug::DebugView;
 use crate::json_crdt::{CrdtNode, JsonValue, OpState};
 use crate::op::{join_path, print_path, Op, PathSegment, SequenceNumber};
+use serde::{Deserialize, Serialize};
 use std::cmp::{max, Ordering};
 use std::fmt::Debug;
 
@@ -14,7 +15,11 @@ use crate::keypair::AuthorId;
 
 /// A simple delete-wins, last-writer-wins (LWW) register CRDT.
 /// Basically only for adding support for primitives within a more complex CRDT
-#[derive(Clone)]
+#[derive(Clone, Serialize, Deserialize)]
+#[serde(bound(
+    serialize = "T: serde::Serialize",
+    deserialize = "T: serde::de::DeserializeOwned"
+))]
 pub struct LwwRegisterCrdt<T>
 where
     T: CrdtNode,