Add Unity analyzer

Directory.Build.props

@@ -13,4 +13,11 @@
     <PackageReference Include="HarmonyX" Version="2.9.0" />
   </ItemGroup>
 
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Unity.Analyzers" Version="1.13.0">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
+    </PackageReference>
+  </ItemGroup>
+
 </Project>