Add network socket example for ktor-network and netty

libmc-common/build.gradle.kts

@@ -18,10 +18,6 @@ kotlin {
 
         jvmMain.dependencies {}
 
-//        nativeMain.dependencies {
-//            implementation(libs.ktor.network)
-//        }
-
         commonTest.dependencies {
             implementation(kotlin("test"))
             implementation(libs.kotlinx.coroutines.test)

libmc-common/src/commonMain/kotlin/cn/rtast/libmc/network/SocketContext.kt

@@ -7,8 +7,14 @@
 
 package cn.rtast.libmc.network
 
+import cn.rtast.libmc.crypto.ProtocolContextBuilder
+
 public abstract class SocketContext {
     public abstract val engine: SocketEngine
 
     public fun createSocket(host: String, port: Int): RawSocket = engine.create(host, port)
-}
+}
+
+public fun (ProtocolContextBuilder.() -> Unit).withCustom(
+    block: ProtocolContextBuilder.() -> Unit,
+): ProtocolContextBuilder.() -> Unit = { this@withCustom.invoke(this); this.block() }