v2.12.0

v2.12.0 ✨ Auto-detect standings zones per competition + Dutch support

Standings card: hardcoded zones [1,2,3,4]/[5,6]/'bottom3' were Serie A
specific. Replaced with ZONE_PRESETS map and auto-detection by
competition_code / entity name:

• Major leagues: Serie A, Premier League, LaLiga, Bundesliga, Ligue 1,
  Eredivisie, Primeira Liga (each with correct CL/EL/CnL/Relegation slots)
• UEFA league phases (UCL/UEL/UECL): top 8 → R16, 9-24 → KO playoff,
  25-36 (bottom 12) → eliminated
• Unknown competitions: no colored zones
• New helper _positionInZone supports 'bottomN' (any N) in addition to
  arrays
• New config options: zone_preset (string), zone_config (full override)
• Defaults backwards-compatible: existing configs with zone_config keep
  working

Editor: added Nederlands option to language dropdown across all 7 cards
(complementing PR #20 which added the nl translations to i18n.js).

Bundle: 219 → 231 KB.