Opinionate the template, also some updates like the new build configs.

Content.Client/ClientContentIoC.cs

@@ -1,5 +1,3 @@
-using Robust.Shared.IoC;
-
 namespace Content.Client;
 
 internal static class ClientContentIoC

Content.Client/Content.Client.csproj

@@ -3,11 +3,15 @@
   <PropertyGroup>
     <!-- Work around https://github.com/dotnet/project-system/issues/4314 -->
     <TargetFramework>$(TargetFramework)</TargetFramework>
-    <LangVersion>latest</LangVersion>
+    <LangVersion>11</LangVersion>
     <IsPackable>false</IsPackable>
     <AppendTargetFrameworkToOutputPath>false</AppendTargetFrameworkToOutputPath>
     <OutputPath>..\bin\Content.Client\</OutputPath>
     <OutputType Condition="'$(FullRelease)' != 'True'">Exe</OutputType>
+    <WarningsAsErrors>nullable</WarningsAsErrors>
+    <Nullable>enable</Nullable>
+    <Configurations>Debug;Release;Tools;DebugOpt</Configurations>
+    <Platforms>AnyCPU</Platforms>
   </PropertyGroup>
   <Import Project="..\RobustToolbox\MSBuild\Robust.DefineConstants.targets" />
   <ItemGroup>

Content.Client/EntryPoint.cs

@@ -1,8 +1,5 @@
 using Robust.Client;
-using Robust.Client.Graphics;
 using Robust.Shared.ContentPack;
-using Robust.Shared.GameObjects;
-using Robust.Shared.IoC;
 using Robust.Shared.Prototypes;
 using Robust.Shared.Timing;
 

Content.Client/GlobalUsings.cs

@@ -0,0 +1,10 @@
+global using System;
+global using System.Collections.Generic;
+global using Robust.Shared.Analyzers;
+global using Robust.Shared.Log;
+global using Robust.Shared.Localization;
+global using Robust.Shared.GameObjects;
+global using Robust.Shared.IoC;
+global using Robust.Shared.Maths;
+global using Robust.Shared.ViewVariables;
+global using Robust.Shared.Serialization.Manager.Attributes;