Node Env Webpack Plugin

Simplifies NODE_ENV handling in webpack builds. Current stable version 2.0.0 (2024), requires Node.js >=18 and is pure ESM. Sets process.env.NODE_ENV automatically: defaults to 'development' at import time if undefined, or 'production' when webpack runs with -p. Provides convenience boolean getters (isProduction, isDevelopment, isTest) to avoid typos, and a devtool helper that selects source-map in production and cheap-module-source-map in development. Replaces manual NODE_ENV checks and webpack.EnvironmentPlugin setup with a single plugin.