feat(boost_asio): add TcpResolver alias for Boost.Asio TCP resolver

src/common/aliases/boost_asio.hpp

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+#pragma once
+#include <boost/asio/io_context.hpp>
+
+// IO Contextct
+using IoContext = boost::asio::io_context;

src/common/aliases/boost_asio_ip_tcp.hpp

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+#pragma once
+#include <boost/asio/ip/tcp.hpp>
+
+// TCP
+using TcpSocket = boost::asio::ip::tcp::socket;
+using TcpAcceptor = boost::asio::ip::tcp::acceptor;
+using TcpEndpoint = boost::asio::ip::tcp::endpoint;
+using TcpResolver = boost::asio::ip::tcp::resolver;

src/common/aliases/boost_asio_steady_timer.hpp

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+#pragma once
+#include <boost/asio/steady_timer.hpp>
+
+// Timers
+using SteadyTimer = boost::asio::steady_timer;

src/common/aliases/boost_system_error_code.hpp

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+#pragma once
+#include <boost/system/error_code.hpp>
+
+// Error handling
+using ErrorCode = boost::system::error_code;

src/common/aliases/std_cstdint.hpp

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+#pragma once
+#include <cstdint>
+
+// Fixed-width unsigned integers
+using u8 = std::uint8_t;
+using u32 = std::uint32_t;
+using u64 = std::uint64_t;