started on foundry system development with system.json and template.json and started on the core ruleset

systemFiles/modules/sheets/Lights-EndItemSheet.js

@@ -0,0 +1,5 @@
+export default class LE1eItemSheet extends Itemsheet {
+    get template() {
+        return 'systems/LE1e/systemFiles/templates/sheets/${this.item.data.type}-sheet.html';
+    }
+}