Add Shopee Singapore benchmark target

[nyx-rattapoom]

Summary

Adds Shopee Singapore (shopee.sg) as a new bypass benchmark target. Shopee uses a traffic-verification redirect for detected bots; this target verifies the engine lands on the real storefront instead of the verification page.

Key Changes

• New check function utils/targets/check_bypass/shopee.py
  • check_shopee_bypass() reads window.location.href via the engine and fails closed (returns False) if the URL is missing, non-string, or contains the verify/traffic/error marker.
• config/benchmark_targets.py
  • Registers shopee_sg in BypassTargetsSettings.targets.
  • Wires check_shopee_bypass into the checkers dict.
  • Imports kept consistent with surrounding ordering.

Detection Logic

Bot traffic is redirected to a URL containing verify/traffic/error. Absence of that marker after navigation indicates a successful bypass.

Testing

• python -m py_compile config/benchmark_targets.py passes.
• Rebased on latest main; conflicts with the akamai/kasada/perimeterx/reddit targets resolved (both sets retained).