feat(turbo-gen): templates for gen event consume (handler + Payload task)

turbo/generators/templates/event/consume/handler.test.ts.hbs

@@ -0,0 +1,15 @@
+// packages/{{kebabCase feature}}/src/events/handlers/on-{{kebabCase publisher}}-{{kebabCase event}}.handler.test.ts
+import { describe, it, expect } from "vitest";
+import { on{{pascalCase publisher}}{{pascalCase event}}Handler } from "@/events/handlers/on-{{kebabCase publisher}}-{{kebabCase event}}.handler";
+
+describe("on{{pascalCase publisher}}{{pascalCase event}}Handler", () => {
+  it("returns a function (factory shape)", () => {
+    const handler = on{{pascalCase publisher}}{{pascalCase event}}Handler();
+    expect(typeof handler).toBe("function");
+  });
+
+  it("does not throw on a valid stub event", async () => {
+    const handler = on{{pascalCase publisher}}{{pascalCase event}}Handler();
+    await expect(handler({} as never)).resolves.toBeUndefined();
+  });
+});