Revise Flutter News Toolkit documentation (#12524)

_Description of what this PR is changing or adding, and why:_

Updated the Flutter News Toolkit documentation to reflect maintenance by
Very Good Ventures and add a link for the latest information.

_Issues fixed by this PR (if any):_ none

_PRs or commits this PR depends on (if any):_ none

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---------

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

Author: mit-mit

src/_data/sidenav.yml

@@ -164,8 +164,6 @@
           permalink: https://codelabs.developers.google.com/codelabs/google-maps-in-flutter
         - title: Google Maps package
           permalink: https://developers.google.com/maps/flutter-package
-    - title: Build a news app
-      permalink: /resources/news-toolkit
 
 - title: AI solutions
   permalink: /ai

src/content/resources/news-toolkit.md

@@ -3,57 +3,9 @@ title: Flutter News Toolkit
 description: Learn more about creating a newsfeed app in Flutter.
 ---
 
-The Flutter News Toolkit enables you to accelerate
-development of a mobile news app.
-The toolkit assists you in building a customized
-template app with prebuilt features required
-for most news apps, such authentication and
-monetization. After generating your
-template app, your primary tasks are to connect to your
-data source, and to customize the UI to reflect
-your brand.
+The Flutter News Toolkit is now maintained by Very Good Ventures (VGV).
 
-The Flutter News Toolkit includes critical features,
-such as:
+For the latest information, see the
+[news_toolkit repository on GitHub][news-toolkit].
 
-* User onboarding
-* Account creation/login
-* Content feeds and content pages
-* Analytics
-* Notifications
-* Social sharing
-* Subscriptions
-* Ads
-
-You can use these pre-integrated features out of the box,
-or modify and swap them with other functionality that
-you prefer.
-
-Generating your template app requires answering
-a few simple questions, as described on the
-[Flutter News Toolkit Overview][toolkit] doc page.
-
-For complete documentation on how to configure your project,
-create a template app, develop the app, how to
-handle authentication, theming, work with an API
-server, and much more, check out the
-[Flutter News Toolkit][toolkit] documentation.
-
-You might also check out:
-
-* [Announcing the Flutter News Toolkit][blog],
-  an article on Medium.
-* [Quick start to building a news app in Flutter][video]
-  an introduction to the toolkit on YouTube.
-
-:::note
-This is an early release of the news toolkit and,
-while it has been tested by early adopters, it
-might have issues or rough edges. Please don't
-hesitate to [file an issue][].
-:::
-
-[toolkit]: https://flutter.github.io/news_toolkit/
-[blog]: {{site.flutter-medium}}/announcing-the-flutter-news-toolkit-180a0d32c012
-[video]: {{site.yt.watch}}?v=dukRAS-OUMM
-[file an issue]: {{site.repo.flutter}}/issues
+[news-toolkit]: https://github.com/VGVentures/news_toolkit