✨(backend) add ancestors links definitions to document abilities

The frontend needs to display inherited link accesses when it displays
possible selection options. We need to return this information to the
client.

CHANGELOG.md

@@ -121,6 +121,7 @@ and this project adheres to
 
 ## Added
 
+- ✨(backend) add ancestors links definitions to document abilities #846
 - 🚩(backend) add feature flag for the footer #841
 - 🔧(backend) add view to manage footer json #841
 - ✨(frontend) add custom css style #771

src/backend/core/tests/documents/test_api_documents_trashbin.py

@@ -74,6 +74,7 @@ def test_api_documents_trashbin_format():
             "accesses_view": True,
             "ai_transform": True,
             "ai_translate": True,
+            "ancestors_links_definitions": {},
             "attachment_upload": True,
             "children_create": True,
             "children_list": True,