Add Review Reminders (Recurring Reviews) for Documents & Collections

Add Review Reminders (Recurring Reviews) for Documents & Collections Problem Knowledge bases and management systems (e.g., ISO 9001, SOPs, safety manuals) require regular content reviews. Currently, Outline has no built-in way to remind users to check or re-approve content at a set interval. Without this, policies or instructions can become outdated without anyone noticing. --- Proposed Solution 1. Review Reminder Field - New property on a document or collection: Review reminder. - Accepts either: - Absolute date (e.g., 2025-06-30) - Recurring interval (e.g., every 6 or 12 months). 2. Responsible Person(s) - Default = collection owner / “Responsible” field. - Allow override per document (single user or group). 3. Notifications & UX - In-app + email notifications when review date is approaching or overdue. - “Snooze” options (1 / 2 / 4 weeks). - Dashboard view / filter: *Due soon*, *Overdue*, *To…