Enhance school creation functionality by introducing support for name sets in the API and UI. Update the catalog to include skills, traits, body attributes, needs, and name sets, improving character generation capabilities. Revise localization strings for better user guidance and update tests to validate the new name set functionality and ensure robustness in school creation processes.

src/HSchool.Simulation/SchoolRegistry.cs

@@ -10,6 +10,7 @@ public enum SchoolCreationError
     InvalidMap,
     UnknownMod,
     InvalidCatalog,
+    UnknownNameSet,
 }
 
 /// <summary>Outcome of <see cref="SchoolRegistry.Create"/>: either the school or the reason there is none.</summary>