GitLab

* adds leaderboard tasks

* Delete lm_eval/tasks/leaderboard/leaderboard_chat_template.yaml

* add readme

* Delete lm_eval/tasks/leaderboard/mmlu_pro/mmlu_pro_chat_template.yaml

* modify readme

* fix bbh task

* fix bbh salient task

* modify the readme

* Delete lm_eval/tasks/leaderboard/ifeval/README.md

* Delete lm_eval/tasks/leaderboard/math/README.md

* add leaderboard to the tasks repertory

* add anouncment about new leaderbaord tasks

* linting

* Update README.md
Co-authored-by: Hailey Schoelkopf <65563625+haileyschoelkopf@users.noreply.github.com>

* installs ifeval dependency in new_task github workflow

---------
Co-authored-by: Nathan Habib <nathan.habib@huggingface.com>
Co-authored-by: Hailey Schoelkopf <65563625+haileyschoelkopf@users.noreply.github.com>