fix(FN-3161): migrate roadmap dashboard surface to bundled plugin

- Move RoadmapsView UI, hooks, and tests from dashboard app into fusion-plugin-roadmap
- Replace the built-in roadmaps route/nav wiring with plugin view registration and host rendering
- Add bundled plugin view registration bootstrap in dashboard startup
- Update roadmap plugin build/test config and add FN-3161 removal changeset

Fusion-Task-Id: FN-3161

plugins/fusion-plugin-roadmap/package.json

@@ -14,8 +14,8 @@
       "import": "./src/server/index.ts"
     },
     "./dashboard-view": {
-      "types": "./src/dashboard-view.ts",
-      "import": "./src/dashboard-view.ts"
+      "types": "./src/dashboard-view.tsx",
+      "import": "./src/dashboard-view.tsx"
     },
     "./roadmap-suggestions": {
       "types": "./src/roadmap-suggestions.d.ts",
@@ -30,11 +30,18 @@
     "@fusion/core": "workspace:*",
     "@fusion/dashboard": "workspace:*",
     "@fusion/plugin-sdk": "workspace:*",
-    "express": "^5.1.0"
+    "express": "^5.1.0",
+    "lucide-react": "^0.542.0",
+    "react": "^19.0.0",
+    "react-dom": "^19.2.4"
   },
   "devDependencies": {
+    "@testing-library/jest-dom": "^6.6.3",
+    "@testing-library/react": "^16.3.2",
+    "@testing-library/user-event": "^14.6.1",
     "@types/express": "^5.0.5",
     "@types/node": "^25.5.2",
+    "@types/react": "^19.0.0",
     "typescript": "^5.7.0",
     "vitest": "^3.2.4"
   }