Fix package.json export, keep empty index.js chunk

Author: mkszepp

package.json

@@ -15,6 +15,10 @@
     "#src/*": "./src/*"
   },
   "exports": {
+    ".": {
+      "types": "./declarations/index.d.ts",
+      "default": "./dist/index.js"
+    },
     "./addon-main.js": "./addon-main.cjs",
     "./*": {
       "types": "./declarations/*.d.ts",

rollup.config.mjs

@@ -60,6 +60,7 @@ export default [
       // is aligned to the config here.
       // See https://github.com/embroider-build/embroider/blob/main/docs/v2-faq.md#how-can-i-define-the-public-exports-of-my-addon
       addon.publicEntrypoints([
+        'index.js',
         'config.js',
         'styles.js',
         'components/**/*.js',