added pagination in leaderboard admin

web_admin/pagination.py

@@ -0,0 +1,13 @@
+"""
+web_admin pagination file
+"""
+from rest_framework.pagination import PageNumberPagination
+
+
+class CustomPageNumberPagination(PageNumberPagination):
+    """
+    custom paginator class
+    """
+    page_size = 10  # Set the desired page size
+    page_size_query_param = 'page_size'
+    max_page_size = 100  # Set a maximum page size if needed