chore(tests): scaffold Chip8.Tests project with test harness

tests/Chip8.Tests/Chip8.Tests.csproj

@@ -0,0 +1,27 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>disable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <IsPackable>false</IsPackable>
+    <RootNamespace>Chip8.Tests</RootNamespace>
+    <AssemblyName>Chip8.Tests</AssemblyName>
+    <LangVersion>10</LangVersion>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.6.0" />
+    <PackageReference Include="xunit" Version="2.4.2" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.5" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\src\Chip8.Core\Chip8.Core.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <None Include="goldens\*.txt" CopyToOutputDirectory="PreserveNewest" />
+  </ItemGroup>
+
+</Project>