fix: Multiple bug fixes and code cleanup

- package.json: Add missing @eslint/js and globals devDependencies
- docker-entrypoint.sh: Fix X11 lock file name (.X1-lock → .X11-lock)
- epic-claimer-new.js: Use imported solveCloudflare/isCloudflareChallenge instead of duplicate implementations
- src/cloudflare.js: Fix solveCloudflare to use cfg.flaresolverr_url, remove unused imports
- epic-games.js: Remove unused code (getFreeGamesFromGraphQL, exchangeTokenForCookies, FREE_GAMES_QUERY, deviceAuthLoginSuccess variable)
- Run eslint --fix to clean up trailing spaces

docker-entrypoint.sh

@@ -59,7 +59,7 @@ export BROWSER_DIR
 # Remove X server display lock, fix for `docker compose up` which reuses container which made it fail after initial run, https://github.com/vogler/free-games-claimer/issues/31
 # echo $DISPLAY
 # ls -l /tmp/.X11-unix/
-rm -f /tmp/.X1-lock
+rm -f /tmp/.X11-lock
 
 # Ensure X11 socket dir exists with sane ownership/permissions.
 mkdir -p /tmp/.X11-unix