test(FN-4486): complete Step 4 — add plugin-sdk re-export contract test

Fusion-Task-Id: FN-4486
Fusion-Task-Lineage: 7d3b40b2-883f-450c-96ec-796f8af4fa45

packages/plugin-sdk/src/__tests__/re-export-contract.test.ts

@@ -0,0 +1,18 @@
+import { describe, expectTypeOf, it } from "vitest";
+import type {
+  FusionPlugin,
+  PluginInstallation,
+  PluginSetupHooks,
+  PluginSetupManifest,
+  PluginState,
+} from "../index.js";
+
+describe("plugin-sdk re-export contract", () => {
+  it("re-exports the plugin-setup and lifecycle types from @fusion/core", () => {
+    expectTypeOf<PluginSetupHooks>().not.toBeAny();
+    expectTypeOf<PluginSetupManifest>().not.toBeAny();
+    expectTypeOf<FusionPlugin>().not.toBeAny();
+    expectTypeOf<PluginState>().not.toBeAny();
+    expectTypeOf<PluginInstallation>().not.toBeAny();
+  });
+});