feat(account): add grpc to communicate with account server

src/grpc/mod.rs

@@ -0,0 +1,8 @@
+use std::env;
+use std::net::Ipv4Addr;
+use once_cell::sync::Lazy;
+use tonic::{Request, Status};
+
+type InterceptorFunc = Box<(dyn Fn(Request<()>) -> Result<Request<()>, Status> + Send)>;
+mod protobufs;
+pub mod account;