Gsa/issue 703 redos vulnerability (#718)

* Update USWDS library version from 3.9.0 to 3.10.0

* Update eslint library

* Update eslint config and fixed errors

* Adding eslint.config.mjs file as it is required with eslint version 9.

* Update eslint.config.mjs file. Removed incorrect rules.

training-front-end/eslint.config.mjs

@@ -0,0 +1,88 @@
+import globals from "globals";
+import astro from "eslint-plugin-astro";
+import typescriptEslint from "@typescript-eslint/eslint-plugin";
+import tsParser from "@typescript-eslint/parser";
+import vueParser from "vue-eslint-parser";
+import astroParser from "astro-eslint-parser";
+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 [...compat.extends("eslint:recommended", "plugin:@typescript-eslint/recommended"), {
+
+    plugins: {
+        "@typescript-eslint": typescriptEslint,
+    },
+
+    languageOptions: {
+        globals: {
+            ...globals.browser,
+            ...globals.node,
+            Fragment: "readonly",
+        },
+
+        parser: tsParser,
+        ecmaVersion: "latest",
+        sourceType: "module",
+    },
+}, {
+    files: ["**/*.js"],
+
+    languageOptions: {
+        globals: {
+            global: "writeable",
+        },
+    },
+}, ...compat.extends(
+    "eslint:recommended",
+    "plugin:astro/recommended",
+    "plugin:astro/jsx-a11y-strict",
+).map(config => ({
+    ...config,
+    files: ["**/*.astro"],
+})), {
+    files: ["**/*.astro"],
+
+    languageOptions: {
+        parser: astroParser,
+        ecmaVersion: 5,
+        sourceType: "script",
+
+        parserOptions: {
+            parser: "@typescript-eslint/parser",
+            extraFileExtensions: [".astro"],
+        },
+    },
+
+    rules: {
+        "astro/jsx-a11y/anchor-is-valid": "off",
+    },
+}, ...compat.extends("plugin:vue/vue3-recommended", "plugin:vuejs-accessibility/recommended").map(config => ({
+    ...config,
+    files: ["**/*.vue"],
+})), {
+    files: ["**/*.vue"],
+
+    languageOptions: {
+        parser: vueParser,
+        ecmaVersion: "latest",
+        sourceType: "module",
+    },
+
+    rules: {
+        "vuejs-accessibility/label-has-for": ["error", {
+            required: {
+                some: ["id"],
+            },
+        }],
+    },
+}];