refactor(loldle): import champions.json directly, drop ESM wrapper

Node 24 + wrangler 4.x both accept `import ... with { type: "json" }`,
so the generated champions-data.js wrapper is no longer needed.

Drop scripts/build-loldle-data.js and the build:loldle-data npm script.
Scraper writes champions.json only.

.github/workflows/scrape-loldle-data.yml

@@ -47,6 +47,4 @@ jobs:
             `attackType`, `region`, `lane`, `releaseDate`).
 
             Review the diff, merge, then run `npm run deploy` to ship.
-          add-paths: |
-            src/modules/loldle/champions.json
-            src/modules/loldle/champions-data.js
+          add-paths: src/modules/loldle/champions.json