refactor: rename zitare -> quotes (Zitate)

Zitare was opaque Latin/Italian-flavored branding. Renamed to clear
English "quotes" (DE: Zitate) matching short-concrete-noun cluster.

- Module, routes, API, i18n, standalone landing app, plans dirs
- Dexie tables: quotesFavorites, quotesLists, quotesListTags,
  customQuotes (dropped redundant "quotes" prefix on the last)
- Logo QuotesLogo, theme quotes.css, search provider, dashboard
  widget QuoteWidget
- German user-facing label "Zitate" (English brand stays Quotes)

Pre-launch, no data migration needed.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.prettierignore

@@ -72,7 +72,7 @@ apps/chat/FEATURE_REQUIREMENTS.md
 apps/cards/CI_CD_SETUP_GUIDE.md
 apps/cards/MANA_CORE_INTEGRATION_CHECKLIST.md
 apps/picture/DEPLOYMENT_COMPLETE.md
-apps/zitare/apps/web/THEMING.md
+apps/quotes/apps/web/THEMING.md
 BACKEND_DESIGN_PATTERN_AUDIT.md
 COMPATIBILITY_MATRIX_AND_REMEDIATION.md
 cicd/