feat(FN-3637): establish canonical roadmap plugin ID and compatibility rout

Merged commits stabilize the Fusion roadmap plugin's identity and routing surface, establishing a canonical plugin ID and compatibility routes so the roadmap plugin integrates cleanly with the dashboard's plugin system. Added new roadmap-routes and roadmap-suggestions modules in the dashboard packag

Fusion-Task-Id: FN-3637

packages/dashboard/app/hooks/__tests__/useViewState.test.ts

@@ -73,7 +73,7 @@ describe("useViewState", () => {
     const { result } = renderHook(() => useViewState(createOptions()));
 
     await waitFor(() => {
-      expect(result.current.taskView).toBe("plugin:roadmap-planner:roadmaps");
+      expect(result.current.taskView).toBe("plugin:fusion-plugin-roadmap:roadmaps");
     });
   });