Remove ktor-network dependency use native socket

src/jvmMain/kotlin/cn/rtast/nmdns/sleep1.jvm.kt

@@ -6,6 +6,6 @@
 
 package cn.rtast.nmdns
 
-actual fun sleep1(time: Int) {
+public actual fun sleep1(time: Int) {
     Thread.sleep(time * 1000L)
 }

src/jvmMain/kotlin/cn/rtast/nmdns/socket.jvm.kt

@@ -0,0 +1,32 @@
+/*
+ * Copyright © 2025 RTAkland
+ * Author: RTAkland
+ * Date: 9/30/25
+ */
+
+
+package cn.rtast.nmdns
+
+import java.net.DatagramPacket
+import java.net.InetAddress
+import java.net.InetSocketAddress
+import java.net.MulticastSocket
+
+public actual class Socket1 internal actual constructor() {
+    private lateinit var socket: MulticastSocket
+    private val group: InetAddress = InetAddress.getByName("224.0.0.251")
+
+    public actual fun bind(ip: String, port: Int): Socket1 {
+        socket = MulticastSocket(InetSocketAddress(ip, port))
+        socket.joinGroup(group)
+        return this
+    }
+
+    public actual fun send(packet: ByteArray) {
+        socket.send(DatagramPacket(packet, packet.size, group, 5353))
+    }
+
+    public actual fun destroy() {
+        socket.close()
+    }
+}