Move desktop and e2e into examples/ directory

- desktop/ → examples/django-react-desktop-app/
- e2e/ → examples/django-react-site/
- example/ → examples/django-react-site/backend/
- Update Dockerfile.test, Makefile, playwright config, and
  django.config.mjs path references

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

examples/django-react-desktop-app/pyproject.toml

@@ -0,0 +1,25 @@
+[project]
+name = "mizan-desktop"
+version = "0.1.0"
+description = "Desktop integration test app for mizan"
+requires-python = ">=3.10"
+dependencies = [
+    "mizan[channels]",
+    "uvicorn[standard]>=0.30",
+    "pywebview[qt]>=5.0",
+]
+
+[tool.uv.sources]
+mizan = { path = "../django", editable = true }
+
+[project.optional-dependencies]
+dev = [
+    "pytest>=8.0",
+    "pytest-django>=4.9",
+    "httpx>=0.27",
+]
+
+[tool.pytest.ini_options]
+DJANGO_SETTINGS_MODULE = "backend.settings"
+pythonpath = ["."]
+testpaths = ["tests"]