rpc: Implement get-client-status and watch-client-status

Closes #1384 (closed)

crates/arti/src/rpc.rs

@@ -38,6 +38,11 @@ pub(crate) fn launch_rpc_listener<R: Runtime>(
     let listener = UnixListener::bind(path)?;
     let rpc_mgr =
         RpcMgr::new(move |_auth| RpcSession::new_with_client(Arc::new(client.isolated_client())));
+    // Register methods. Needed since TorClient is generic.
+    //
+    // TODO: If we accumulate a large number of generics like this, we should do this elsewhere.
+    rpc_mgr.register_rpc_methods(TorClient::<R>::rpc_methods());
+
     let rt_clone = runtime.clone();
     let rpc_mgr_clone = rpc_mgr.clone();