Initial commit: React frontend (SLP Software) + AIDLC workflow docs

Co-authored-by: Junie <junie@jetbrains.com>

src/main.tsx

@@ -0,0 +1,17 @@
+import { StrictMode } from 'react';
+import { createRoot } from 'react-dom/client';
+import { RouterProvider } from '@tanstack/react-router';
+import './fonts';
+import './index.css';
+import { router } from './router';
+
+const rootElement = document.getElementById('root');
+if (!rootElement) {
+  throw new Error('Root element "#root" not found in index.html');
+}
+
+createRoot(rootElement).render(
+  <StrictMode>
+    <RouterProvider router={router} />
+  </StrictMode>,
+);