add and use generator method for system objects

test/generators.ts

@@ -0,0 +1,10 @@
+import { ISystem } from "../src/entities/entities";
+
+
+export function generateMockSystems(): ISystem[] {
+  return [
+    { id: "1", name: "System A" },
+    { id: "2", name: "System B" },
+    { id: "3", name: "System C" },
+  ];
+}