Create wrapper index.js for Node.js library

nodejs/index.js

@@ -0,0 +1,3 @@
+// This wrapper file exists to allow importing from ESM contexts, as Node.js does not allow importing ".node" modules directly from ESM.
+
+module.exports = require("./index.node");

nodejs/package.json.gen.js

@@ -2,9 +2,9 @@ const fs = require("fs");
 
 const common = {
   version: "0.8.0",
-  main: "index.node",
+  main: "index.js",
   types: "index.d.ts",
-  files: ["cli.js", "postinstall.js", "index.d.ts"],
+  files: ["cli.js", "postinstall.js", "index.d.ts", "index.js"],
   scripts: {
     build: "node-gyp build && shx mv build/Release/index.node index.node",
     clean: