Add Activepieces integration for workflow automation

- Add Activepieces fork with SmoothSchedule custom piece
- Create integrations app with Activepieces service layer
- Add embed token endpoint for iframe integration
- Create Automations page with embedded workflow builder
- Add sidebar visibility fix for embed mode
- Add list inactive customers endpoint to Public API
- Include SmoothSchedule triggers: event created/updated/cancelled
- Include SmoothSchedule actions: create/update/cancel events, list resources/services/customers

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

activepieces-fork/packages/react-ui/src/main.tsx

@@ -0,0 +1,14 @@
+import { StrictMode } from 'react';
+import * as ReactDOM from 'react-dom/client';
+
+import './i18n';
+import App from './app/app';
+
+const root = ReactDOM.createRoot(
+  document.getElementById('root') as HTMLElement,
+);
+root.render(
+  <StrictMode>
+    <App />
+  </StrictMode>,
+);