docs: improved simple history installation guide (#1038)

Author: lukasvinclav

docs/integrations/django-simple-history.md

@@ -1,9 +1,40 @@
 ---
 title: django-simple-history
 order: 0
-description: Integration with django-simple-history.
+description: Learn how to integrate django-simple-history with Django Unfold admin panel to track and display model history changes for seamless version control and change tracking.
 ---
 
 # django-simple-history
 
-To make this application work, add `unfold.contrib.simple_history` into `settings.py` in `INSTALLED_APPS` variable before right after `unfold`. This app should ensure that templates coming from django-simple-history are overridden by Unfold.
+To make this application work, add `unfold.contrib.simple_history` to the `INSTALLED_APPS` variable in `settings.py`, placing it after `unfold` but before `simple_history`. This app ensures that templates from django-simple-history are overridden by Unfold.
+
+```python
+# settings.py
+
+INSTALLED_APPS = [
+    "unfold",
+    # ...
+    "unfold.contrib.simple_history",
+    # ...
+    "simple_history",
+]
+```
+
+Below you can find an example of how to use Unfold with django-simple-history. The important part is to inherit from `SimpleHistoryAdmin` and `unfold.adminModelAdmin`.
+
+```python
+# admin.py
+
+from django.contrib import admin
+from django.contrib.auth import get_user_model
+
+from simple_history.admin import SimpleHistoryAdmin
+from unfold.admin import ModelAdmin
+
+User = get_user_model()
+
+
+@admin.register(User)
+class UserAdmin(SimpleHistoryAdmin, ModelAdmin):
+    pass
+```