#9263 3cbd8ea75 Thanks @bluwy! - Removes additional deprecated APIs:
- The Astro preview server now returns a 404 status instead of a 301 redirect when requesting assets from the public directory without a base.
- Removes special handling when referencing the astro/client-image type. You should use the astro/client type instead.
- Removes deprecated built-in rss support in getStaticPaths. You should use @astrojs/rss instead.
- Removes deprecated Astro.request.params support. You should use Astro.params instead.

#9200 b4b851f5a Thanks @ematipico! - Adds a new way to configure the i18n.locales array.

Developers can now assign a custom URL path prefix that can span multiple language codes:
```
// astro.config.mjs
export default defineConfig({
  experimental: {
    i18n: {
      defaultLocale: 'english',
      locales: ['de', { path: 'english', codes: ['en', 'en-US'] }, 'fr'],
      routingStrategy: 'prefix-always',
    },
  },
});
```
With the above configuration, the URL prefix of the default locale will be /english/. When computing Astro.preferredLocale, Astro will use the codes.
#9139 459b26436 Thanks @bluwy! - Reworks Vite's logger to use Astro's logger to correctly log HMR messages

#9252 7b74ec4ba Thanks @ematipico! - Consistently emit fallback routes in the correct folders, and emit routes that consider trailingSlash
#9235 9c2342c32 Thanks @Princesseuh! - Fix SVG icons not showing properly in the extended dropdown menu of the dev overlay
#9254 b750a161e Thanks @matthewp! - Improve highlight/tooltip positioning when in fixed positions
#9230 60cfa49e4 Thanks @FredKSchott! - Update the look and feel of the dev overlay
#9248 43ddb5217 Thanks @martrapp! - Adds properties of the submit button (name, value) to the form data of a view transition
#9255 9ea3e0b94 Thanks @matthewp! - Adds instructions on how to hide the dev overlay
#9013 ff8eadb95 Thanks @bayssmekanique! - Returns the updated config in the integration astro:config:setup hook's updateConfig() API