优化 MSBuild 在 Release 时 不生成PDB

新增平台架构(win/mac/linux)
优化 发布配置

System.Application.SteamTools.Client.Desktop.Platform/IDesktopPlatformService.cs

@@ -0,0 +1,14 @@
+using ResizeMode = System.Int32;
+
+namespace System.Application.Services
+{
+    public interface IDesktopPlatformService
+    {
+        void SetResizeMode(IntPtr hWnd, ResizeMode value);
+
+        public const ResizeMode ResizeMode_NoResize = 0;
+        public const ResizeMode ResizeMode_CanMinimize = 1;
+        public const ResizeMode ResizeMode_CanResize = 2;
+        public const ResizeMode ResizeMode_CanResizeWithGrip = 3;
+    }
+}