Add announcement post

Author: a16n-dev

packages/docs-v3/src/content/docs/blog/2025-10-04-release-3-0-0.mdx

@@ -15,6 +15,15 @@ Over time as the library has matured, I've started to disagree with some of the
 any breaking changes, but I feel that now is the right time to pay down some technical debt, and bundle all of the breaking changes
 together into a newer, more polished version of the library.
 
+## What's new?
+
+- New `useDialogLazy()` hook that supports bundle splitting dialogs. Read the [docs here](/concepts/performance/#lazy-loading), or check out the [API reference](/reference/hooks/use-dialog-lazy).
+
+- New `<StaticDialog/>` component for rendering dialogs created for `useDialog()` statically in JSX. [API reference](/reference/components/static-dialog)
+
+## Breaking changes
+
+There are a number of breaking changes in this release. Please read the [migration guide](/guides/v3-migration) for more details.
 
 ---