switch to ESM and update config/test wiring

Signed-off-by: CrazyMax <1951866+crazy-max@users.noreply.github.com>

__tests__/testResultsProcessor.cjs

@@ -0,0 +1,28 @@
+/**
+ * Copyright 2024 actions-toolkit authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/* eslint-disable @typescript-eslint/no-require-imports */
+const fs = require('fs');
+
+module.exports = results => {
+  const allSkipped = results.testResults.every(result => result.skipped);
+  if (allSkipped) {
+    console.log('All tests were skipped!');
+    fs.mkdirSync('./coverage', {recursive: true});
+    fs.closeSync(fs.openSync('./coverage/allSkipped.txt', 'w'));
+  }
+  return results;
+};