Overhaul 2 0

[sergioalmela]

2.0.0

Breaking changes

• search() now returns a clean, denormalised structure: { offers, lowestPrices }.
  Each offer already has its merchant, edition and region resolved to a
  readable name (instead of numeric ids), plus currentPrice, minDiscountPrice,
  couponCode and lastUpdate. lowestPrices.official and lowestPrices.keyshops
  expose the cheapest official-store and key-reseller price (either may be null). Closes Search is not working #2
  This replaces the previous { success, offers, merchants, editions, regions } shape.

Fixes

• Fix search returning no results: migrated to the price_history_api endpoint,
  as the old admin-ajax offers endpoint had stopped returning data.
• Cache the game catalog in the OS temp directory instead of inside the package,
  so it keeps working when installed as a read-only dependency.
• Only cache successful catalog responses (previously an error payload could be
  written to disk and read back as valid for a day).

Improvements

• Deduplicate concurrent catalog downloads onto a single in-flight request.
• Reuse the fuzzy-search index across searches instead of rebuilding it every call.
• Behavioural test suite covering the transform, store/name filtering, currency
  handling and the error/empty paths.
• The build no longer emits test files into dist.

Tooling

• Upgrade all dependencies to their latest versions (TypeScript 6.0, Jest 30,
  @types/node 26, …).
• Modernise tsconfig for TypeScript 6.0: moduleResolution: nodenext and an
  explicit types field (TS 6.0 no longer auto-includes @types/*).
• Replace ESLint + Prettier with Biome (npm run check).