docs(wiki): actualize pages against 0.36/0.37, add Personalization and IGDB/Kinorium import pages Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
docs(wiki): document Books and add Data, Sync & Backup page Catch up the wiki with releases 0.31-0.35. New "Data, Sync & Backup" page (EN + RU) covering the movable data folder, device-to-device sync over Wi-Fi, and rolling back the last sync. Linked from the sidebar, Home, and Settings. Fold the Books media type (OpenLibrary + Fantlab) into the pages that already cover other media types: Search sources and filters, the Collections media-type filter, Item Details (reading progress by pages, Fantlab editions, similar books), and the keyless sources in API Keys. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>