zotero: Add user.js that sets recursiveCollections

.config/zotero/user.js

@@ -0,0 +1,7 @@
+// SPDX-License-Identifier: MIT
+// Copyright (c) 2025 Julian Prein
+//
+// The symlink in Zotero's profile has to be created manually:
+// ~/.zotero/zotero/*/user.js -> ~/.config/zotero/user.js
+
+user_pref("extensions.zotero.recursiveCollections", true);