Reorganize HighFive example into highfive/ subdirectory

**Structure Before:**
examples/
  ├── HighFive.py, HighFive.html, HighFive.wasm, HighFive.ll (loose files)
  ├── highfive.html (old duplicate)
  ├── tabs/Tabs.*
  └── textinput/TextInput.*

**Structure After:**
examples/
  ├── highfive/HighFive.*
  ├── tabs/Tabs.*
  └── textinput/TextInput.*

**Changes:**
- Moved all HighFive.* files to examples/highfive/ subdirectory
- Updated paths in HighFive.html: runtime/ → ../runtime/
- Removed old duplicate highfive.html file
- Now consistent with tabs/ and textinput/ structure

**Testing:**
Access via: http://localhost:8111/highfive/HighFive.html

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

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

examples/highfive/HighFive.html

@@ -0,0 +1,96 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>HighFive Counter - Ritz Framework</title>
+    <link rel="stylesheet" href="../runtime/ritz-debug.css">
+    <style>
+        body {
+            font-family: system-ui, sans-serif;
+            background: #f5f5f5;
+        }
+        #app {
+            max-width: 800px;
+            margin: 50px auto;
+            padding: 40px;
+            background: white;
+            border-radius: 8px;
+            box-shadow: 0 2px 8px rgba(0,0,0,0.1);
+        }
+        .high-five-app {
+            text-align: center;
+        }
+        .high-five-app p {
+            font-size: 18px;
+            margin: 15px 0;
+            color: #333;
+        }
+        .high-five-app .count {
+            font-size: 48px;
+            font-weight: bold;
+            color: #0066cc;
+            margin: 30px 0;
+        }
+        .high-five-app button {
+            font-size: 18px;
+            padding: 15px 40px;
+            background: #0066cc;
+            color: white;
+            border: none;
+            border-radius: 8px;
+            cursor: pointer;
+            transition: all 0.2s;
+        }
+        .high-five-app button:hover {
+            background: #0052a3;
+            transform: scale(1.05);
+        }
+        .high-five-app button:active {
+            transform: scale(0.98);
+        }
+    </style>
+</head>
+<body>
+    <div id="app"></div>
+
+    <div id="ritz-debug" class="ritz-debug hidden">
+        <div class="debug-header">
+            <h3>🎭 Ritz Debug</h3>
+            <button onclick="ritzDebug.toggle()">×</button>
+        </div>
+        <div id="status" class="status">Loading...</div>
+        <div class="debug-content">
+            <div class="debug-section">
+                <h4>Component</h4>
+                <pre>HighFive.py (Reactive Signals)</pre>
+            </div>
+            <div class="debug-section">
+                <h4>Features</h4>
+                <pre>✓ Signal in WASM memory
+✓ Event handlers
+✓ Reactive updates</pre>
+            </div>
+            <div class="debug-section">
+                <h4>Console Commands</h4>
+                <pre>ritzRuntime.getLog()
+ritzInstance.exports.get_high_fives()
+ritzInstance.exports.increment()</pre>
+            </div>
+        </div>
+    </div>
+
+    <script src="../runtime/ritz-runtime.js"></script>
+    <script src="../runtime/ritz-debug.js"></script>
+    <script>
+        // Wait for DOM to be ready
+        if (document.readyState === 'loading') {
+            document.addEventListener('DOMContentLoaded', () => {
+                new RitzLoader().load('HighFive.wasm', 'HighFive');
+            });
+        } else {
+            new RitzLoader().load('HighFive.wasm', 'HighFive');
+        }
+    </script>
+</body>
+</html>