Centralize ESLint into a single root config

Replace the duplicated per-workspace eslint.config.mjs files in
apps/console, apps/trust, packages/ui, and packages/eslint-config with
one root eslint.config.mjs that reuses the shared @probo/eslint-config
rule sets and scopes them per directory. Linting now runs from the repo
root, so pin the type-checked project service root and broaden the
import-x resolver to every workspace tsconfig (the #/* aliases live in
each app's tsconfig.app.json).

Drop the now-redundant per-package lint scripts and lint-only devDeps,
and add a root lint script that runs eslint over the four dirs with
multithreading restored via --concurrency auto, then lints n8n-node
through a direct workspace call. packages/n8n-node keeps its own
external preset.

Collapse the redundant lint-js -> npm-lint Makefile chain into a single
lint-js target and update the make docs accordingly.

Signed-off-by: Émile Ré <emile@probo.com>

eslint.config.mjs

@@ -0,0 +1,66 @@
+import { configs } from "@probo/eslint-config";
+import { defineConfig, globalIgnores } from "eslint/config";
+
+// Workspaces that are linted by this root config. Each gets the shared rule
+// sets below; everything else is ignored so a bare `eslint .` keeps the same
+// scope as the previous per-workspace configs.
+const appDirs = ["apps/console/**", "apps/trust/**"];
+const reactDirs = [...appDirs, "packages/ui/**"];
+const lintedDirs = [...reactDirs, "packages/eslint-config/**"];
+
+export default defineConfig([
+  // Keep `configs.base` global so its `globalIgnores` (dist, __generated__,
+  // *.d.ts, ...) stay global rather than being scoped by a wrapping `files`.
+  configs.base,
+  globalIgnores([
+    "examples/**",
+    "packages/coredata/**",
+    "packages/cookie-banner/**",
+    "packages/emails/**",
+    "packages/eslint-relay-plugin-types/**",
+    "packages/helpers/**",
+    "packages/hooks/**",
+    "packages/i18n/**",
+    "packages/n8n-node/**",
+    "packages/prosemirror/**",
+    "packages/react-lazy/**",
+    "packages/relay/**",
+    "packages/routes/**",
+    "packages/tsconfig/**",
+  ]),
+  {
+    files: lintedDirs,
+    extends: [configs.ts, configs.imports, configs.stylistic],
+    // Linting runs from the repo root, so pin the project service root and let
+    // it resolve each file to its nearest package tsconfig.json.
+    languageOptions: {
+      parserOptions: {
+        tsconfigRootDir: import.meta.dirname,
+      },
+    },
+  },
+  {
+    files: reactDirs,
+    extends: [configs.react],
+  },
+  {
+    files: appDirs,
+    extends: [configs.relay],
+  },
+  {
+    files: reactDirs,
+    ignores: ["packages/ui/tailwind.config.js"],
+    extends: [configs.languageOptions.browser],
+  },
+  {
+    files: ["packages/eslint-config/**"],
+    extends: [configs.languageOptions.node],
+  },
+  {
+    files: ["packages/ui/tailwind.config.js"],
+    extends: [configs.languageOptions.node],
+    languageOptions: {
+      sourceType: "commonjs",
+    },
+  },
+]);