add new project sandd

Signed-off-by: kerthcet <kerthcet@gmail.com>

Author: kerthcet

layouts/_default/home.html

@@ -64,6 +64,12 @@ <h2 class="h4"><a href="https://github.com/InftyAI/amrs">AMRS</a></h2>
                 </p>
             </div>
 
+            <div class="col-lg-5">
+                <h2 class="h4"><a href="https://github.com/InftyAI/sandd">SandD</a></h2>
+                <p>🤖 A lightweight sandbox daemon for secure agent execution in isolated environments.
+                </p>
+            </div>
+
             <div class="col-lg-5">
                 <h2 class="h4"><a href="https://github.com/InftyAI/community" style="color: #FFD700;">✨ Donation
                         Plan</a></h2>