build: Update ESLint to v9 (#16639)

packages/node-dev/.eslintrc.js

@@ -1,16 +0,0 @@
-const sharedOptions = require('@n8n/eslint-config/shared');
-
-/**
- * @type {import('@types/eslint').ESLint.ConfigData}
- */
-module.exports = {
-	extends: ['@n8n/eslint-config/base'],
-	...sharedOptions(__dirname),
-	ignorePatterns: [
-		'templates/**', // TODO: remove this
-	],
-	rules: {
-		'@typescript-eslint/ban-ts-comment': ['warn', { 'ts-ignore': true }],
-		'n8n-local-rules/no-plain-errors': 'off',
-	},
-};

packages/node-dev/eslint.config.mjs

@@ -0,0 +1,12 @@
+import { defineConfig } from 'eslint/config';
+import { baseConfig } from '@n8n/eslint-config/base';
+
+export default defineConfig(baseConfig, {
+	rules: {
+		'unicorn/filename-case': ['error', { case: 'kebabCase' }],
+
+		// TODO: Remove this
+		'unicorn/filename-case': 'warn',
+		'@typescript-eslint/naming-convention': 'warn',
+	},
+});

packages/node-dev/package.json

@@ -15,8 +15,8 @@
     "build-node-dev": "tsc",
     "format": "biome format --write .",
     "format:check": "biome ci .",
-    "lint": "eslint . --quiet",
-    "lintfix": "eslint . --fix",
+    "lint": "eslint src --quiet",
+    "lintfix": "eslint src --fix",
     "prepack": "echo \"Building project...\" && rm -rf dist && tsc -b",
     "watch": "tsc --watch"
   },