[feat] update some feature

sync code of  fastrtc,
add text support through datachannel,
fix safari connect problem
support chat without camera or mic

demo/nextjs_voice_chat/frontend/fastrtc-demo/components/ui/reset-chat.tsx

@@ -0,0 +1,18 @@
+"use client"
+
+import { Trash } from "lucide-react"
+
+export function ResetChat() {
+    return (
+        <button
+            className="w-10 h-10 rounded-md flex items-center justify-center transition-colors relative overflow-hidden bg-black/10 hover:bg-black/20 dark:bg-white/10 dark:hover:bg-white/20"
+            aria-label="Reset chat"
+            onClick={() => fetch("http://localhost:8000/reset")}
+        >
+            <div className="relative z-10">
+                <Trash className="h-5 w-5 text-black/70 dark:text-white/70" />
+            </div>
+    </button>
+    )
+}
+