Add a latest news markdown file for future version.

Signed-off-by: Adam Treat <treat.adam@gmail.com>

gpt4all-chat/metadata/latestnews.md

@@ -0,0 +1,10 @@
+## Welcome to GPT4All 3.0!
+
+We're thrilled to introduce you to our latest release, packed with exciting updates and improvements!
+
+### What's new in this major update?
+
+* **LocalDocs Experience**: We've upgraded the localdocs experience within GPT4All.
+* **New Design**: We've created a modern design that will make it easier for you to focus on what matters most - getting things done!
+
+Thank you for being part of the GPT4All community!