Update highlight-js to eslint 9.0 (#15092)

eslint 9 has breaking changes, and also eslint-plugin-header doesn't
work with it.

See
https://eslint.org/docs/latest/use/configure/migration-guide#migrate-your-config-file

This also creates a src\copyright-template.js file which can be used by
all eslint.config.mjs files when other pieces are updated.
###### Microsoft Reviewers: [Open in
CodeFlow](https://microsoft.github.io/open-pr/?codeflow=https://github.com/Azure/bicep/pull/15092)

src/copyright-template.js

@@ -0,0 +1,2 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.

src/highlightjs/eslint.config.mjs

@@ -0,0 +1,60 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
+import notice from "eslint-plugin-notice";
+import tsParser from "@typescript-eslint/parser";
+import globals from "globals";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+import js from "@eslint/js";
+import { FlatCompat } from "@eslint/eslintrc";
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+const compat = new FlatCompat({
+    baseDirectory: __dirname,
+    recommendedConfig: js.configs.recommended,
+    allConfig: js.configs.all
+});
+
+export default [{
+    ignores: ["out/**/*"],
+}, ...compat.extends("eslint:recommended"), {
+    plugins: {
+        notice,
+    },
+
+    languageOptions: {
+        parser: tsParser,
+        ecmaVersion: 2020,
+        sourceType: "module",
+
+        parserOptions: {
+            project: "./tsconfig.json",
+        },
+    },
+
+    rules: {
+        "notice/notice": [
+            2,
+            {
+                "templateFile": "../copyright-template.js",
+            }
+        ]
+    }
+}, ...compat.extends("plugin:@typescript-eslint/recommended", "plugin:jest/all").map(config => ({
+    ...config,
+    files: ["**/*.ts"],
+})), {
+    files: ["**/*.ts"],
+
+
+}, {
+    files: ["**/*.js"],
+
+    languageOptions: {
+        globals: {
+            ...globals.node,
+        },
+    },
+}];