doc: Added comment on webpack config

webpack/webpack.config.js

@@ -125,6 +125,9 @@ module.exports = ({ analyze, env } = {}) => ({
         symlinks: false,
         extensions: [".ts", ".tsx", ".js", ".jsx", ".json"],
         mainFields: ["module", "main", "browser"],
+        // Papaparse relies on `stream` which is a Node.js module that's not available in the browser.
+        // Webpack configuration will fail unless we tell it to ignore the `stream` module and not
+        // to try and find a fallback/pollyfill for it.
         fallback: {
             stream: false,
         },