Add project files.

tests/UserManager.Application.Tests/Class1.cs

@@ -0,0 +1,7 @@
+namespace UserManager.Application.Tests
+{
+    public class Class1
+    {
+
+    }
+}

tests/UserManager.Application.Tests/UserManager.Application.UnitTests.csproj

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