documented the detail class based view

Author: amirreza8002

docs/views/async-class-based-views/detail.md

@@ -0,0 +1,29 @@
+## AsyncDetailView
+
+`AsyncDetailView` generic view is provided
+
+```python
+from django_async_extensions.aviews.generic import AsyncDetailView
+
+class MyDetailView(AsyncDetailView):
+    model = MyModel
+```
+
+`AsyncDetailView` is similar to django's [DetailView](https://docs.djangoproject.com/en/5.1/ref/class-based-views/generic-display/#detailview) but with a few differences:
+
+1. `get_object()` method is async.
+2. `get_queryset()` method is async.
+3. `get()` method is async.
+4. `AsyncDetailView` inherits from [AsyncView](async-class-based-views.md#asyncview) so anything mentioned there also applies here.
+
+
+## Base classes
+some of the base classes for `DetailView` have been re-written as async:
+
+#### AsyncSingleObjectMixin
+
+like [SingleObjectMixin](https://docs.djangoproject.com/en/5.1/ref/class-based-views/mixins-single-object/#django.views.generic.detail.SingleObjectMixin) but `get_object()` and `get_queryset()` are async.
+
+#### AsyncBaseDetailView
+
+like [BaseDetailView](https://docs.djangoproject.com/en/5.1/ref/class-based-views/generic-display/#django.views.generic.detail.BaseDetailView) but `get()` is async.