refactor(Core): 折叠 6 段 TFM 条件 ItemGroup 为 2 段

原 6 段几乎相同的 ItemGroup 表达 6 个 TFM (ns2.0/2.1 各 1 段,net6/7/8/10 各 1 段)。
折叠为 2 段:
- ns2.x 段 (OR 条件):引入 3 个包 (含 System.Runtime.Loader)
- 其余 .NET 段 (AND-NOT 条件):引入 2 个包

新增 TFM 只需在 props 加 Update 段,csproj 无需改。

Author: hueifeng

src/Magicodes.ExporterAndImporter.Core/Magicodes.IE.Core.csproj

@@ -6,42 +6,20 @@
 	<ItemGroup>
 		<PackageReference Include="System.ComponentModel.Annotations" />
 	</ItemGroup>
-	<!-- netstandard2.0 依赖 -->
-	<ItemGroup Condition=" '$(TargetFramework)' == 'netstandard2.0' ">
-		<PackageReference Include="Microsoft.Extensions.DependencyInjection" />
-		<PackageReference Include="Microsoft.Extensions.DependencyModel" />
-		<PackageReference Include="System.Runtime.Loader" />
-	</ItemGroup>
 
-	<!-- netstandard2.1 依赖 -->
-	<ItemGroup Condition=" '$(TargetFramework)' == 'netstandard2.1' ">
+	<!-- netstandard 2.x 依赖 (System.Runtime.Loader 仅 ns2.0+ 需要) -->
+	<ItemGroup Condition=" '$(TargetFramework)' == 'netstandard2.0' OR '$(TargetFramework)' == 'netstandard2.1' ">
 		<PackageReference Include="Microsoft.Extensions.DependencyInjection" />
 		<PackageReference Include="Microsoft.Extensions.DependencyModel" />
 		<PackageReference Include="System.Runtime.Loader" />
 	</ItemGroup>
 
-
-	<!-- .NET 6.0+ 依赖 -->
-	<ItemGroup Condition=" '$(TargetFramework)' == 'net6.0' ">
-		<PackageReference Include="Microsoft.Extensions.DependencyInjection" />
-		<PackageReference Include="Microsoft.Extensions.DependencyModel" />
-	</ItemGroup>
-
-	<ItemGroup Condition=" '$(TargetFramework)' == 'net7.0' ">
-		<PackageReference Include="Microsoft.Extensions.DependencyInjection" />
-		<PackageReference Include="Microsoft.Extensions.DependencyModel" />
-	</ItemGroup>
-
-	<ItemGroup Condition=" '$(TargetFramework)' == 'net8.0' ">
+	<!-- .NET 6+ 依赖 -->
+	<ItemGroup Condition=" '$(TargetFramework)' != 'netstandard2.0' AND '$(TargetFramework)' != 'netstandard2.1' ">
 		<PackageReference Include="Microsoft.Extensions.DependencyInjection" />
 		<PackageReference Include="Microsoft.Extensions.DependencyModel" />
 	</ItemGroup>
 
-	<ItemGroup Condition=" '$(TargetFramework)' == 'net10.0' ">
-		<PackageReference Include="Microsoft.Extensions.DependencyInjection" />
-		<PackageReference Include="Microsoft.Extensions.DependencyModel" />
-	</ItemGroup>
-	
 	<ItemGroup>
 		<Compile Update="Resource.Designer.cs">
 			<DesignTime>True</DesignTime>