更新资源文件的可见性设置为 Visible="true"

在多个项目文件中（`ExampleProject.csproj`、`Lib1.Ns2.Ns3.csproj`、`Lib1.csproj` 和 `Lib2.csproj`），
将 `<AdditionalFiles Include="Resources\**\*"` 的 `Visible` 属性从 `false` 修改为 `true`。
此更改确保资源文件在构建过程中可见，从而支持源生成器或其他工具正确处理这些文件。

Author: Soar360

examples/ExampleProject/ExampleProject.csproj

@@ -57,7 +57,7 @@
 
   <!-- Add resource files as AdditionalFiles for source generator -->
   <ItemGroup>
-    <AdditionalFiles Include="Resources\**\*" Visible="false" />
+    <AdditionalFiles Include="Resources\**\*" Visible="true" />
   </ItemGroup>
 
 </Project>

examples/Lib1.Ns2.Ns3/Lib1.Ns2.Ns3.csproj

@@ -23,7 +23,7 @@
 
 	<!-- Add resource files as AdditionalFiles for source generator -->
 	<ItemGroup>
-		<AdditionalFiles Include="Resources\**\*" Visible="false" />
+		<AdditionalFiles Include="Resources\**\*" Visible="true" />
 	</ItemGroup>
 
 	<!-- For development with project references, manually import and override assembly path -->

examples/Lib1/Lib1.csproj

@@ -23,7 +23,7 @@
 
   <!-- Add resource files as AdditionalFiles for source generator -->
   <ItemGroup>
-    <AdditionalFiles Include="Resources\**\*" Visible="false" />
+    <AdditionalFiles Include="Resources\**\*" Visible="true" />
   </ItemGroup>
 
   <!-- For development with project references, manually import and override assembly path -->

examples/Lib2/Lib2.csproj

@@ -24,7 +24,7 @@
 
   <!-- Add resource files as AdditionalFiles for source generator -->
   <ItemGroup>
-    <AdditionalFiles Include="Resources\**\*" Visible="false" />
+    <AdditionalFiles Include="Resources\**\*" Visible="true" />
   </ItemGroup>
 
   <UsingTask TaskName="LuYao.ResourcePacker.MSBuild.ResourcePackerTask"