Restructure repo into five-package AFI architecture

Mizan is an Application Framework Interface (AFI) with five
independent packages:

  packages/
    mizan-ast/       Language layer (source → KDL schema)
    mizan-schema/    IR layer (KDL schema definition)
    mizan-rpc/       Protocol layer (client gen + server adapters)
      adapters/django/   ← was django/
      generator/         ← was react/src/generator/
    mizan-csr/       State layer (client state engine)
      adapters/react/    ← was react/
    mizan-ssr/       Rendering layer (server-side rendering)

Each package is independent. The adapter directories contain the
framework-specific implementations. Stub packages (ast, schema, ssr)
establish the structure for future work.

264 Django tests + 33 React tests pass from new locations.

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

packages/mizan-csr/adapters/react/vitest.config.ts

@@ -0,0 +1,27 @@
+import { defineConfig } from 'vitest/config'
+import path from 'path'
+
+export default defineConfig({
+    resolve: {
+        alias: {
+            'mizan/channels': path.resolve(__dirname, 'src/channels/index.ts'),
+            'mizan/client/react': path.resolve(__dirname, 'src/client/react.ts'),
+            'mizan/client/nextjs': path.resolve(__dirname, 'src/client/nextjs.tsx'),
+            'mizan/client': path.resolve(__dirname, 'src/client/index.ts'),
+            'mizan/jwt': path.resolve(__dirname, 'src/jwt/index.ts'),
+            'mizan/allauth/nextjs': path.resolve(__dirname, 'src/allauth/nextjs.tsx'),
+            'mizan/allauth': path.resolve(__dirname, 'src/allauth/index.ts'),
+            'mizan': path.resolve(__dirname, 'src/index.ts'),
+        },
+    },
+    test: {
+        globals: true,
+        environment: 'jsdom',
+        setupFiles: ['./vitest.setup.ts'],
+        include: ['src/**/*.test.{ts,tsx}'],
+        exclude: [
+            // Requires @/api/generated.mizan.schema.json from consuming project
+            'src/jwt/__tests__/contract.test.ts',
+        ],
+    },
+})