feat: integrate news data fetching by slug and update ContentsFormPage to utilize fetched data

app/routes/_admin.lg-admin._dashboard.contents.update.$slug.tsx

@@ -1,4 +1,20 @@
+import { getNewsBySlug } from '~/apis/common/get-news-by-slug'
+import { handleCookie } from '~/libs/cookies'
 import { ContentsFormPage } from '~/pages/contents-form'
 
-const DashboardContentUpdateLayout = () => <ContentsFormPage />
+import type { Route } from './+types/_admin.lg-admin._dashboard.contents.update.$slug'
+
+export const loader = async ({ request }: Route.LoaderArgs) => {
+  const { staffToken } = await handleCookie(request)
+  const { data: newsData } = await getNewsBySlug({
+    accessToken: staffToken,
+    slug: request.url.split('/').pop() ?? '',
+  })
+  return { newsData }
+}
+
+const DashboardContentUpdateLayout = ({ loaderData }: Route.ComponentProps) => {
+  const newsData = loaderData.newsData
+  return <ContentsFormPage newsData={newsData} />
+}
 export default DashboardContentUpdateLayout