build: Update ESLint to v9 (#16639)

packages/frontend/@n8n/rest-api-client/.eslintrc.cjs

@@ -1,10 +0,0 @@
-const sharedOptions = require('@n8n/eslint-config/shared');
-
-/**
- * @type {import('@types/eslint').ESLint.ConfigData}
- */
-module.exports = {
-	extends: ['@n8n/eslint-config/frontend'],
-
-	...sharedOptions(__dirname, 'frontend'),
-};

packages/frontend/@n8n/rest-api-client/eslint.config.mjs

@@ -0,0 +1,15 @@
+import { defineConfig } from 'eslint/config';
+import { frontendConfig } from '@n8n/eslint-config/frontend';
+
+export default defineConfig(frontendConfig, {
+	rules: {
+		// TODO: Remove these
+		'@typescript-eslint/naming-convention': 'warn',
+		'@typescript-eslint/no-empty-object-type': 'warn',
+		'@typescript-eslint/prefer-nullish-coalescing': 'warn',
+		'@typescript-eslint/no-unsafe-member-access': 'warn',
+		'@typescript-eslint/no-unsafe-return': 'warn',
+		'@typescript-eslint/no-unsafe-assignment': 'warn',
+		'@typescript-eslint/no-unsafe-argument': 'warn',
+	},
+});

packages/frontend/@n8n/rest-api-client/package.json

@@ -27,8 +27,8 @@
     "typecheck": "vue-tsc --noEmit",
     "test": "vitest run",
     "test:dev": "vitest --silent=false",
-    "lint": "eslint src --ext .js,.ts,.vue --quiet",
-    "lintfix": "eslint src --ext .js,.ts,.vue --fix",
+    "lint": "eslint src --quiet",
+    "lintfix": "eslint src --fix",
     "format": "biome format --write . && prettier --write . --ignore-path ../../../../.prettierignore",
     "format:check": "biome ci . && prettier --check . --ignore-path ../../../../.prettierignore"
   },
@@ -50,9 +50,9 @@
     "@testing-library/jest-dom": "catalog:frontend",
     "@testing-library/user-event": "catalog:frontend",
     "tsup": "catalog:",
-    "typescript": "catalog:frontend",
-    "vite": "catalog:frontend",
-    "vitest": "catalog:frontend"
+    "typescript": "catalog:",
+    "vite": "catalog:",
+    "vitest": "catalog:"
   },
   "license": "See LICENSE.md file in the root of the repository"
 }