✨ 新增多平台 MSBuild 属性文件支持跨平台构建

新增 TFM_NETX_WITH_ALL.props 和 TFM_NETX_WITH_ANDROID.props 两个 MSBuild 属性文件，实现对多目标框架（如 macos、windows、android、ios、maccatalyst 等）的支持。根据不同操作系统自动调整 TargetFrameworks、SupportedOSPlatformVersion、编译常量等属性，并引入 StyleCop.Analyzers 以提升代码规范性。优化了跨平台构建的灵活性和可维护性。

Author: rmbadmin

src/TFM_NETX_WITH_ALL.props

@@ -0,0 +1,21 @@
+<Project>
+	<PropertyGroup>
+		<TargetFrameworks>net$(DotNet_Version)</TargetFrameworks>
+		<!--<TargetFrameworks Condition="$([MSBuild]::IsOSPlatform('windows'))">$(TargetFrameworks);net$(DotNet_Version)-android;net$(DotNet_Version)-ios;net$(DotNet_Version)-macos;net$(DotNet_Version)-maccatalyst;net$(DotNet_Version)-windows$(WinSDK_Version)</TargetFrameworks>-->
+		<TargetFrameworks Condition="$([MSBuild]::IsOSPlatform('windows'))">$(TargetFrameworks);net$(DotNet_Version)-macos;net$(DotNet_Version)-windows$(WinSDK_Version)</TargetFrameworks>
+		<TargetFrameworks Condition="$([MSBuild]::IsOSPlatform('osx'))">$(TargetFrameworks);net$(DotNet_Version)-android;net$(DotNet_Version)-ios;net$(DotNet_Version)-macos;net$(DotNet_Version)-maccatalyst</TargetFrameworks>
+		<TargetFrameworks Condition="$([MSBuild]::IsOSPlatform('linux'))">$(TargetFrameworks)</TargetFrameworks>
+		<SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'ios'">14.2</SupportedOSPlatformVersion>
+		<SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'maccatalyst'">14.0</SupportedOSPlatformVersion>
+		<SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'macos'">10.15</SupportedOSPlatformVersion>
+		<SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'android'">21.0</SupportedOSPlatformVersion>
+		<SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'windows'">10.0.17763.0</SupportedOSPlatformVersion>
+		<TargetPlatformMinVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'windows'">10.0.17763.0</TargetPlatformMinVersion>
+		<DefineConstants Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == ''">LINUX;$(DefineConstants)</DefineConstants>
+		<DefineConstants Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'ios' OR $([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'maccatalyst' OR $([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'macos' OR $([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'android'">DISABLE_ASPNET_CORE;$(DefineConstants)</DefineConstants>
+	</PropertyGroup>
+
+	<ItemGroup>
+		<PackageReference Include="StyleCop.Analyzers" PrivateAssets="All" />
+	</ItemGroup>
+</Project>

src/TFM_NETX_WITH_ANDROID.props

@@ -0,0 +1,7 @@
+<Project>
+	<PropertyGroup>
+		<!--<TargetFrameworks>net$(DotNet_Version);net$(DotNet_Version)-android</TargetFrameworks>-->
+		<TargetFrameworks>net$(DotNet_Version)</TargetFrameworks>
+		<SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'android'">21.0</SupportedOSPlatformVersion>
+	</PropertyGroup>
+</Project>