chore(deps): update dependency eslint to v9 (#124)

* chore(deps): update dependency eslint to v9

* chore: upgrade eslint and aws-cdk

---------

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: evan-boone <[email protected]>

Author: renovate[bot]

.eslintignore

@@ -0,0 +1,46 @@
+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: [
+        "**/*.d.ts",
+        "**/*.js",
+        "**/*.mjs",
+        "lib/",
+        "cdk.out/",
+        "**/commitlint.config.js",
+        "example-assets/source/index.js",
+        "**/jest.config.js",
+    ],
+}, ...compat.extends(
+    "plugin:@typescript-eslint/recommended",
+    "plugin:@typescript-eslint/recommended-requiring-type-checking",
+    "prettier",
+    "plugin:prettier/recommended",
+), {
+    languageOptions: {
+        ecmaVersion: 5,
+        sourceType: "module",
+
+        parserOptions: {
+            project: "./tsconfig.eslint.json",
+        },
+    },
+
+    rules: {
+        "@typescript-eslint/no-non-null-assertion": "off",
+        "@typescript-eslint/no-unused-vars": "error",
+    },
+}, {
+    files: ["**/*.ts"],
+}];