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/components/__tests__/MobileNavBar.test.tsx

@@ -411,7 +411,7 @@ describe("MobileNavBar", () => {
         experimentalFeatures={{}}
         pluginDashboardViews={[
           {
-            pluginId: "roadmap-planner",
+            pluginId: "fusion-plugin-roadmap",
             view: { viewId: "roadmaps", label: "Roadmaps", componentPath: "./RoadmapsView", icon: "Map", placement: "primary" },
           },
         ]}