chore: import upstream snapshot with attribution

docs-website/plugins/txtLoaderPlugin.js

@@ -0,0 +1,21 @@
+export default function txtLoaderPlugin() {
+  return {
+    name: 'txt-loader-plugin',
+    /**
+     * Ensure Webpack can handle plain `.txt` files like `llms.txt` without
+     * trying to parse them as JavaScript.
+     */
+    configureWebpack() {
+      return {
+        module: {
+          rules: [
+            {
+              test: /\.txt$/i,
+              type: 'asset/source',
+            },
+          ],
+        },
+      };
+    },
+  };
+}