Fix ERR_PACKAGE_PATH_NOT_EXPORTED with Node.js v24 and ESM-only @actions packages (#1659)

* Initial plan

* Initial plan for fixing ESM-only @actions packages build failure

Co-authored-by: marocchino <128431+marocchino@users.noreply.github.com>

* Fix build failure: update tsconfig and rollup config for ESM-only @actions packages

Co-authored-by: marocchino <128431+marocchino@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: marocchino <128431+marocchino@users.noreply.github.com>

rollup.config.ts

@@ -7,12 +7,12 @@ import typescript from "@rollup/plugin-typescript"
 const config = {
   input: "src/main.ts",
   output: {
-    esModule: true,
+    exports: "auto",
     file: "dist/index.js",
-    format: "es",
+    format: "cjs",
     sourcemap: true,
   },
-  plugins: [typescript({outDir: "dist"}), nodeResolve({preferBuiltins: true}), commonjs()],
+  plugins: [typescript(), nodeResolve({preferBuiltins: true}), commonjs()],
 }
 
 export default config

tsconfig.json

@@ -8,8 +8,8 @@
     "forceConsistentCasingInFileNames": true,
     "isolatedModules": true,
     "lib": ["ES2022"],
-    "module": "NodeNext",
-    "moduleResolution": "NodeNext",
+    "module": "ESNext",
+    "moduleResolution": "Bundler",
     "newLine": "lf",
     "noImplicitAny": true,
     "noUnusedLocals": true,