Move hydrateApp to @mfng/core/client/browser

This is imported from the client/browser entry, so it should be in
`@mfng/core/client/browser`, and not in `@mfng/core/client`. The latter
has modules that can used in both, the SSR and browser client. Since
`Router` is also imported through the same barrel file, we can remove
the `'use client'` directive from it.

Continuation from #53 and #54

apps/aws-app/src/client.tsx

@@ -1,4 +1,4 @@
-import {hydrateApp} from '@mfng/core/client';
+import {hydrateApp} from '@mfng/core/client/browser';
 // eslint-disable-next-line import/no-extraneous-dependencies
 import 'tailwindcss/tailwind.css';
 

apps/cloudflare-app/src/client.tsx

@@ -1,4 +1,4 @@
-import {hydrateApp} from '@mfng/core/client';
+import {hydrateApp} from '@mfng/core/client/browser';
 // eslint-disable-next-line import/no-extraneous-dependencies
 import 'tailwindcss/tailwind.css';
 

apps/vercel-app/src/client.tsx

@@ -1,4 +1,4 @@
-import {hydrateApp} from '@mfng/core/client';
+import {hydrateApp} from '@mfng/core/client/browser';
 // eslint-disable-next-line import/no-extraneous-dependencies
 import 'tailwindcss/tailwind.css';
 

packages/core/src/client/browser.ts

@@ -1,2 +1,3 @@
 export * from './call-server.js';
+export * from './hydrate-app.js';
 export * from './router.js';

packages/core/src/client/index.ts

@@ -1,3 +1,2 @@
-export * from './hydrate-app.js';
 export * from './link.js';
 export * from './use-router.js';

packages/core/src/client/router.tsx

@@ -1,5 +1,3 @@
-'use client';
-
 import * as React from 'react';
 import type {RouterLocation} from '../use-router-location.js';
 import {createUrl, createUrlPath} from './router-location-utils.js';