Improve Simple Worldbuilding sheet layout and macro syntax

module/simple.js

@@ -5,6 +5,7 @@
  */
 
 // Import Modules
+import { SimpleActor } from "./actor.js";
 import { SimpleItemSheet } from "./item-sheet.js";
 import { SimpleActorSheet } from "./actor-sheet.js";
 
@@ -24,9 +25,22 @@ Hooks.once("init", async function() {
     decimals: 2
   };
 
+	// Define custom Entity classes
+  CONFIG.Actor.entityClass = SimpleActor;
+
   // Register sheet application classes
   Actors.unregisterSheet("core", ActorSheet);
   Actors.registerSheet("dnd5e", SimpleActorSheet, { makeDefault: true });
   Items.unregisterSheet("core", ItemSheet);
   Items.registerSheet("dnd5e", SimpleItemSheet, {makeDefault: true});
+
+  // Register system settings
+  game.settings.register("worldbuilding", "macroShorthand", {
+    name: "Shortened Macro Syntax",
+    hint: "Enable a shortened macro syntax which allows referencing attributes directly, for example @str instead of @attributes.str.value. Disable this setting if you need the ability to reference the full attribute model, for example @attributes.str.label.",
+    scope: "world",
+    type: Boolean,
+    default: true,
+    config: true
+  });
 });