refactor: usage notes + tests for safer_staticfiles (#538)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

tests/components/safer_staticfiles/safer_staticfiles.py

@@ -0,0 +1,16 @@
+from typing import Any, Dict
+
+from django_components import component
+
+
+# Used for testing the safer_staticfiles app in `test_safer_staticfiles.py`
+@component.register("safer_staticfiles_component")
+class RelativeFileWithPathObjComponent(component.Component):
+    template_name = "safer_staticfiles.html"
+
+    class Media:
+        js = "safer_staticfiles.js"
+        css = "safer_staticfiles.css"
+
+    def get_context_data(self, variable, *args, **kwargs) -> Dict[str, Any]:
+        return {"variable": variable}