fix(eslint): setup eslint to run on every package - N8N-4553 (#4050)

* fix(eslint): setup eslint to run on every package

Also, unify eslint config and dependencies into a private package in the workspace.

packages/@n8n_io/eslint-config/node.js

@@ -0,0 +1,11 @@
+/**
+ * @type {import('@types/eslint').ESLint.ConfigData}
+ */
+module.exports = {
+	extends: ['@n8n_io/eslint-config/base'],
+
+	env: {
+		es6: true,
+		node: true,
+	},
+};