Fix Pro ESLint configuration to ignore open-source package

The Pro ESLint was linting files from the open-source package
(packages/react-on-rails/) which has its own separate ESLint config.
This caused lint failures in CI when the Pro lint job ran.

Added '../packages/react-on-rails/' to globalIgnores to ensure Pro
only lints Pro-specific code.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: justin808

react_on_rails_pro/eslint.config.mjs

@@ -22,6 +22,7 @@ export default defineConfig([
     'spec/react_on_rails/dummy-for-generators',
     // includes some generated code
     'spec/dummy/client/app/packs/server-bundle.js',
+    '../packages/react-on-rails/', // Ignore open-source package (has its own linting)
     '../packages/react-on-rails-pro-node-renderer/lib/',
     '../packages/react-on-rails-pro-node-renderer/tests/fixtures',
     '**/node_modules/',