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.Linux/Implementation/LinuxDesktopPlatformServiceImpl.cs

@@ -0,0 +1,10 @@
+namespace System.Application.Services.Implementation
+{
+    internal sealed class LinuxDesktopPlatformServiceImpl : IDesktopPlatformService
+    {
+        public void SetResizeMode(IntPtr hWnd, int value)
+        {
+
+        }
+    }
+}

System.Application.SteamTools.Client.Desktop.Platform.Linux/ServiceCollectionExtensions.cs

@@ -0,0 +1,23 @@
+using System;
+using System.Application.Services;
+using System.Application.Services.Implementation;
+
+// ReSharper disable once CheckNamespace
+namespace Microsoft.Extensions.DependencyInjection
+{
+    public static class ServiceCollectionExtensions
+    {
+        public static IServiceCollection AddDesktopPlatformService(this IServiceCollection services)
+        {
+            if (DI.Platform == Platform.Linux)
+            {
+                services.AddSingleton<IDesktopPlatformService, LinuxDesktopPlatformServiceImpl>();
+            }
+            else
+            {
+                throw new PlatformNotSupportedException();
+            }
+            return services;
+        }
+    }
+}

System.Application.SteamTools.Client.Desktop.Platform.Linux/System.Application.SteamTools.Client.Desktop.Platform.Linux.csproj

@@ -0,0 +1,18 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net5.0</TargetFramework>
+    <RootNamespace>System.Application.Services</RootNamespace>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <Compile Include="..\System.Common.CoreLib\Properties\AssemblyInfo.cs">
+      <Link>Properties\AssemblyInfo.cs</Link>
+    </Compile>
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\System.Application.SteamTools.Client.Desktop.Platform\System.Application.SteamTools.Client.Desktop.Platform.csproj" />
+  </ItemGroup>
+
+</Project>