(tools, client, server) feat: Remove gRPC support, add TCP back and reorganized project

Client/Assets/Scripts/Network/UnityTcpClient.cs

@@ -0,0 +1,70 @@
+using System;
+using System.Net.Sockets;
+using System.Threading.Tasks;
+using UnityEngine;
+using Utils;
+
+namespace Network
+{
+    public class UnityTcpClient : Singleton<UnityTcpClient>, IDisposable
+    {
+        private TcpClient _client;
+        private bool _disposed;
+
+        public UnityTcpClient()
+        {
+            try
+            {
+                _client = new TcpClient();
+                _client.Connect("127.0.0.1", 12345);
+                Application.quitting += Dispose;
+            }
+            catch (Exception ex)
+            {
+                Debug.LogException(ex);
+                return;
+            }
+        }
+
+        public async Task<byte[]> SendAndReceiveData(byte[] data)
+        {
+            try
+            {
+                await using var stream = _client.GetStream();
+
+                await stream.WriteAsync(data, 0, data.Length);
+
+                var buffer = new byte[1024];
+                await stream.ReadAsync(buffer);
+                return buffer;
+            }
+            catch (Exception ex)
+            {
+                Debug.LogException(ex);
+                return new byte[0];
+            }
+        }
+
+        public void Dispose()
+        {
+            if (_disposed) return;
+
+            try
+            {
+                _client.Close();
+                _client.Dispose();
+            }
+            catch (Exception ex)
+            {
+                Debug.LogException(ex);
+                return;
+            }
+            finally
+            {
+                _client = null;
+            }
+
+            _disposed = true;
+        }
+    }
+}