feat: add smartcmd dedicated server

major bug: when connecting to the server a second time, it gets softlocked and keeps repeating ticking connection A\n in debug logs until it times out.

Minecraft.Server/Console/ServerCli.h

@@ -0,0 +1,50 @@
+#pragma once
+
+#include <memory>
+
+namespace ServerRuntime
+{
+	class ServerCliEngine;
+	class ServerCliInput;
+
+	/**
+	 * **Server CLI facade**
+	 *
+	 * Owns the command engine and input component, and exposes a small lifecycle API.
+	 * CLI 全体の開始・停止・更新をまとめる窓口クラス
+	 */
+	class ServerCli
+	{
+	public:
+		ServerCli();
+		~ServerCli();
+
+		/**
+		 * **Start console input processing**
+		 *
+		 * Connects input to the engine and starts background reading.
+		 * 入力処理を開始してエンジンに接続
+		 */
+		void Start();
+
+		/**
+		 * **Stop console input processing**
+		 *
+		 * Stops background input safely and detaches from the engine.
+		 * 入力処理を安全に停止
+		 */
+		void Stop();
+
+		/**
+		 * **Process queued command lines**
+		 *
+		 * Drains commands collected by input and executes them in the main loop.
+		 * 入力キューのコマンドを実行
+		 */
+		void Poll();
+
+	private:
+		std::unique_ptr<ServerCliEngine> m_engine;
+		std::unique_ptr<ServerCliInput> m_input;
+	};
+}