feat: reference astro/client from astro/config

.changeset/violet-goats-grab.md

@@ -0,0 +1,7 @@
+---
+'astro': minor
+---
+
+Updates `astro/config` import to reference `astro/client` types
+
+When importing `astro/config`, types from `astro/client` will be made automatically available to your project. If your project `tsconfig.json` changes how references behave, you'll still have access to these types after running `astro sync`.

packages/astro/config.d.ts

@@ -1,3 +1,4 @@
+/// <reference path='./client.d.ts' />
 type ViteUserConfig = import('vite').UserConfig;
 type ViteUserConfigFn = import('vite').UserConfigFn;
 type AstroUserConfig = import('./dist/types/public/config.js').AstroUserConfig;