feat: layer component (#1577)

Author: lukasvinclav

docs/components/layer.md

@@ -0,0 +1,42 @@
+---
+title: Component - Layer
+order: 5
+description: Use the Layer component in Django Unfold as an abstract wrapper to inject variables from component classes into templates, enabling seamless data flow between Python logic and template rendering.
+---
+
+# Layer component
+
+The layer component functions as an abstract wrapper that encapsulates other components within the Unfold system. Its primary purpose is to provide a mechanism for injecting variables that are generated by component classes, enabling seamless data flow from your Python logic to the template rendering layer.
+
+```python
+# admin.py
+
+from unfold.components import register_component, BaseComponent
+
+
+@register_component
+class SomeComponent(BaseComponent):
+    def get_context_data(self, **kwargs):
+        context = super().get_context_data(**kwargs)
+        context.update({
+            "some_variable": [
+                {
+                    "title": "Example A",
+                },
+                {
+                    "title": "Example B",
+                }
+            ]
+        })
+        return context
+```
+
+```html
+{% load unfold %}
+
+{% component "unfold/components/layer.html" with component_class="SomeComponent" %}
+    {% for item in some_variable %}
+        {{ item.title }}
+    {% endfor %}
+{% endcomponent %}
+```

src/unfold/templates/unfold/components/layer.html

@@ -0,0 +1 @@
+{{ children }}