feat: string deserialization for prost enums (#2316)

Use pbjson to support string deserialization for enum fields

This allows TOML configs like:
    chainType = "Inbound"
instead of:
    chainType = 1

- Maintain backward compatibility with integer values
- Default serialization format is now string

easytier/src/peers/peer_conn.rs

@@ -654,7 +654,7 @@ impl PeerConn {
             .and_then(|p| p.peer_public_key)
     }
 
-    async fn send_noise_msg<Msg: prost::Message>(
+    async fn send_noise_msg<Msg: prost::Message + Debug>(
         &self,
         pb: Msg,
         packet_type: PacketType,