U:调整结构性目录

src/NetVizor.Backend/Core/Class1.cs

@@ -0,0 +1,5 @@
+namespace Core;
+
+public class Class1
+{
+}

src/NetVizor.Backend/Core/Core.csproj

@@ -0,0 +1,9 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>net8.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+    </PropertyGroup>
+
+</Project>