feat(core-api): compose marketingPages + navigation routers into appRouter

packages/marketing-pages/src/index.ts

@@ -1,4 +1,5 @@
 export type { Page, PageStatus, Hero } from "./entities/page";
 export type { SiteSettings } from "./entities/site-settings";
+export type { MarketingPagesRouter } from "./integrations/api/router";
 export { PageNotFoundError, InputParseError } from "./entities/errors";
 export { pageBySlugQuery, siteSettingsQuery } from "./ui/query";