build: Add npm for dev-ui

Relate-to: https://github.com/Z-Wave-Alliance/z-wave-stack/wiki/ZPC

Author: rzr

helper.mk

@@ -25,6 +25,7 @@ packages+=nlohmann-json3-dev
 # TODO: remove for offline build
 packages+=curl wget python3-pip
 packages+=time
+packages+=npm
 
 rust_url?=https://sh.rustup.rs
 RUST_VERSION?=1.65.0