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/fixtures.tsx

@@ -11,7 +11,7 @@ import { useState, useEffect, useRef } from 'react'
 
 // Generated typed hooks — the actual mizan API
 import {
-    DjangoContext,
+    MizanContext,
     useEcho,
     useAdd,
     useMultiply,
@@ -25,9 +25,9 @@ import {
     useCurrentUser,
     DjangoError,
     useMizan,
-} from './api/generated.django'
+    useChatChannel,
+} from './api'
 import { useContactForm, useLoginForm } from './api/generated.forms'
-import { useChatChannel } from './api/generated.channels.hooks'
 
 // ─── Fixture router ─────────────────────────────────────────────────────────
 
@@ -228,7 +228,7 @@ function FormContactSubmit() {
 // ─── Channel fixtures ───────────────────────────────────────────────────────
 
 function ChannelChatFixture() {
-    // DjangoContext already includes ChannelProvider
+    // MizanContext already includes ChannelProvider
     return <ChannelChat />
 }