test: add coaster name matching test suite

Extract matching logic into lib/coaster-match.ts (isCoasterMatch + normalizeForMatch)
so it can be imported by both the scraper and tests without duplication.

Add tests/coaster-matching.test.ts covering all known match/false-positive cases:
- Trademark symbols, leading THE, possessives, punctuation
- Subtitle variants in both directions (Apocalypse, New Revolution - Classic)
- Space-split brand words (BAT GIRL vs Batgirl)
- 4D subtitle extension (THE JOKER™ 4D Free Fly Coaster vs Joker)
- False positives: Joker y Harley Quinn, conjunction connectors

Run with: npm test

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

package.json

@@ -10,7 +10,8 @@
     "scrape": "tsx scripts/scrape.ts",
     "scrape:force": "tsx scripts/scrape.ts --rescrape",
     "discover": "tsx scripts/discover.ts",
-    "debug": "tsx scripts/debug.ts"
+    "debug": "tsx scripts/debug.ts",
+    "test": "tsx --test tests/*.test.ts"
   },
   "dependencies": {
     "better-sqlite3": "^12.8.0",