Vendor the necessary openra_rl_training + openra_env modules

Fix CI: add openra-rl-util to requirements.txt

Add in-browser evaluation via Evaluate tab

Fix HF Space build: remove unused deps from requirements.txt

Fix scoring dedup, add test suite, wire openra-rl-util

Revert "Fix scoring dedup, add test suite, wire openra-rl-util"

Fix scoring dedup, add test suite, wire openra-rl-util

Add OpenRA-Bench leaderboard, evaluation harness, and rubrics