Regenerate example code + fix broken paths from repo restructure

- Fix testapp/apps.py: import djarea_clients (file was never renamed)
- Fix fetch.mjs: command is export_djarea_schema not export_mizan_schema
- Fix harness package.json: dependency path to mizan-react after restructure
- Add package.json for generator (openapi-typescript dependency)
- Regenerate all example code with new protocol format:
  - generated.provider.tsx uses raw context responses + SSR hydration
  - generated.server.ts uses GET /ctx/global/ with response.ok check
  - generated.forms.ts, channels.ts, channels.hooks.tsx refreshed
- Remove stale generated.django.tsx and generated.django.server.ts
- Update imports: fixtures.tsx and main.tsx import from ./api (index)
- Use MizanContext instead of deprecated DjangoContext in examples

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

examples/django-react-site/harness/src/main.tsx

@@ -1,12 +1,12 @@
 import { createRoot } from 'react-dom/client'
-import { DjangoContext } from './api/generated.django'
+import { MizanContext } from './api'
 import { Fixtures } from './fixtures'
 
 function App() {
     return (
-        <DjangoContext baseUrl="/api/mizan">
+        <MizanContext baseUrl="/api/mizan">
             <Fixtures />
-        </DjangoContext>
+        </MizanContext>
     )
 }