feat: server entry and web shell with design tokens

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

apps/web/index.html

@@ -0,0 +1,14 @@
+<!doctype html>
+<html lang="en">
+<head>
+  <meta charset="utf-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <title>STCourses</title>
+  <link rel="stylesheet" href="../../packages/ui/src/fonts.css">
+  <link rel="stylesheet" href="../../packages/ui/src/tokens.css">
+</head>
+<body>
+  <div id="root"></div>
+  <script type="module" src="./src/main.tsx"></script>
+</body>
+</html>