docs: update the wiki for v1.27.0 - Describe v1.27.0 as the current release, linking the changelog - State both supported MCP revisions, 2026-07-28 and 2025-11-25 - Use the README's 57-command count - Document provider statuses, partial coverage and incomplete plans Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>