build: Update ESLint to v9 (#16639)

packages/@n8n/extension-sdk/eslint.config.mjs

@@ -0,0 +1,14 @@
+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
+		'@typescript-eslint/no-unnecessary-boolean-literal-compare': 'warn',
+		'@typescript-eslint/prefer-nullish-coalescing': 'warn',
+		'@typescript-eslint/no-floating-promises': 'warn',
+		'import-x/order': 'warn',
+	},
+});

packages/@n8n/extension-sdk/package.json

@@ -32,6 +32,7 @@
   "scripts": {
     "clean": "rimraf dist",
     "dev": "tsup --watch",
+    "lint": "eslint . --quiet",
     "typecheck:frontend": "vue-tsc --noEmit --project tsconfig.frontend.json",
     "typecheck:backend": "tsc --noEmit --project tsconfig.backend.json",
     "build": "pnpm \"/^typecheck:.+/\" && pnpm clean && tsup && pnpm create-json-schema",
@@ -47,7 +48,7 @@
     "@vitejs/plugin-vue": "catalog:frontend",
     "@vue/tsconfig": "catalog:frontend",
     "rimraf": "catalog:",
-    "vite": "catalog:frontend",
+    "vite": "catalog:",
     "vue": "catalog:frontend",
     "vue-router": "catalog:frontend",
     "vue-tsc": "catalog:frontend",