refactor: rename project to store-scraper-bot

GitHub repo rename: js-store-scraper-bot becomes the canonical store-scraper-bot. The Java reference impl is renamed to legacy-store-scraper-bot in parallel.

Updates: package.json name + description, README header + reference link, wrangler.toml worker name (file slated for removal in cleanup phase but kept consistent in the interim).

package.json

@@ -1,7 +1,7 @@
 {
-  "name": "js-store-scraper-bot",
+  "name": "store-scraper-bot",
   "version": "0.3.0",
-  "description": "JavaScript port of store-scraper-bot — Telegram bot tracking Apple App Store + Google Play app updates. Deploys to Cloudflare Workers, backed by Cloudflare KV.",
+  "description": "Telegram bot tracking Apple App Store + Google Play app updates. JavaScript implementation, ports legacy-store-scraper-bot (Java).",
   "type": "module",
   "private": true,
   "engines": {