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/vitest.config.ts

@@ -12,8 +12,12 @@ export default defineConfig({
     },
   },
   test: {
-    include: ["src/**/*.test.ts"],
-    setupFiles: [fileURLToPath(new URL("../../packages/core/src/__test-utils__/vitest-setup.ts", import.meta.url))],
+    include: ["src/**/__tests__/**/*.test.{ts,tsx}", "src/**/*.test.{ts,tsx}"],
+    environmentMatchGlobs: [["src/dashboard/__tests__/**", "jsdom"]],
+    setupFiles: [
+      fileURLToPath(new URL("../../packages/core/src/__test-utils__/vitest-setup.ts", import.meta.url)),
+      fileURLToPath(new URL("./src/dashboard/test-setup.ts", import.meta.url)),
+    ],
     globalSetup: [fileURLToPath(new URL("../../packages/core/src/__test-utils__/vitest-teardown.ts", import.meta.url))],
     pool: "threads",
     maxWorkers,