docs: V4 beta provider inheritance (#1684)

Related to #1682

Author: amannn

docs/src/pages/blog/next-intl-4-0.mdx

@@ -18,7 +18,8 @@ Here's what's new in `next-intl@4.0`:
 3. [**Strictly-typed ICU arguments**](#strictly-typed-icu-arguments)
 4. [**GDPR compliance**](#gdpr-compliance)
 5. [**Modernized build output**](#modernized-build-output)
-6. [**Preparation for upcoming Next.js features**](#nextjs-future)
+6. [**Improved inheritance in `NextIntlClientProvider`**](#nextintlclientprovider-inheritance)
+7. [**Preparation for upcoming Next.js features**](#nextjs-future)
 
 Please also have a look at the [other breaking changes](#other-breaking-changes) listed below before you upgrade.
 
@@ -188,6 +189,30 @@ The build output of `next-intl` has been modernized and now leverages the follow
 
 With these changes, the bundle size of `next-intl` has been reduced by ~7% ([all details](https://github.com/amannn/next-intl/pull/1470)).
 
+## Improved inheritance of `NextIntlClientProvider` [#nextintlclientprovider-inheritance]
+
+Previously, [`NextIntlClientProvider`](/docs/usage/configuration#nextintlclientprovider) would conservatively inherit only a subset from `i18n/request.ts`.
+
+To improve the getting started experience, the provider now also inherits:
+
+- `messages` ([PR #1682](https://github.com/amannn/next-intl/pull/1682))
+- `formats` ([PR #1191](https://github.com/amannn/next-intl/pull/1191))
+
+Due to this, you can now remove these props from `NextIntlClientProvider` if you've previously passed them manually:
+
+```diff
+<NextIntlClientProvider
+-  messages={messages}
+-  formats={formats}
+>
+  {/* ... */}
+</NextIntlClientProvider>
+```
+
+With this, `NextIntlClientProvider` now inherits all of your configuration, with the minor exception of [error handling functions](/docs/usage/configuration#error-handling). Since functions are not serializable, they cannot be passed across the server/client boundary. However, [an alternative](https://github.com/amannn/next-intl/issues/1285) for this is also on the horizon.
+
+To make it easier to work with error handling functions on the client side, `NextIntlClientProvider` can now also be used in a nested fashion and will inherit the configuration from a parent provider ([PR #1413](https://github.com/amannn/next-intl/pull/1413)).
+
 ## Preparation for upcoming Next.js features [#nextjs-future]
 
 To ensure that the sails of `next-intl` are set for a steady course in the upcoming future, I've investigated the implications of upcoming Next.js features like [`ppr`](https://nextjs.org/docs/app/api-reference/next-config-js/ppr), [`dynamicIO`](https://nextjs.org/docs/canary/app/api-reference/config/next-config-js/dynamicIO) and [`rootParams`](https://github.com/vercel/next.js/pull/72837) for `next-intl`.
@@ -205,13 +230,11 @@ I'm particularly excited about the announcement of `rootParams`, as it seems lik
 ## Other breaking changes
 
 1. Return type-safe messages from `useMessages` and `getMessages` (see [PR #1489](https://github.com/amannn/next-intl/pull/1489))
-2. Inherit context in case nested `NextIntlClientProvider` instances are present (see [PR #1413](https://github.com/amannn/next-intl/pull/1413))
-3. Automatically inherit formats when `NextIntlClientProvider` is rendered from a Server Component (see [PR #1191](https://github.com/amannn/next-intl/pull/1191))
-4. Require locale to be returned from `getRequestConfig` (see [PR #1486](https://github.com/amannn/next-intl/pull/1486))
-5. Disallow passing `null`, `undefined` or `boolean` as an ICU argument (see [PR #1561](https://github.com/amannn/next-intl/pull/1561))
-6. Bump minimum required TypeScript version to 5 for projects using TypeScript (see [PR #1481](https://github.com/amannn/next-intl/pull/1481))
-7. Remove deprecated APIs (see [PR #1479](https://github.com/amannn/next-intl/pull/1479))
-8. Remove deprecated APIs pt. 2 (see [PR #1482](https://github.com/amannn/next-intl/pull/1482))
+2. Require locale to be returned from `getRequestConfig` (see [PR #1486](https://github.com/amannn/next-intl/pull/1486))
+3. Disallow passing `null`, `undefined` or `boolean` as an ICU argument (see [PR #1561](https://github.com/amannn/next-intl/pull/1561))
+4. Bump minimum required TypeScript version to 5 for projects using TypeScript (see [PR #1481](https://github.com/amannn/next-intl/pull/1481))
+5. Remove deprecated APIs (see [PR #1479](https://github.com/amannn/next-intl/pull/1479))
+6. Remove deprecated APIs pt. 2 (see [PR #1482](https://github.com/amannn/next-intl/pull/1482))
 
 ## Upgrade now