Add GRPO and Support RLVR for PPO (#6186)

* add grpo, support rlvr

* add grpo, support rlvr

* tested deepseek r1 pipeline

* add ci

* verify grpo r1

* verify grpo r1

* update readme, remove unused code

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* remove path

* clean code

* fix circular import

* fix ci OOM

* fix ci OOM

* skip kto tp, fix qwen generation

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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

applications/ColossalChat/coati/trainer/__init__.py

@@ -1,5 +1,6 @@
 from .base import OLTrainer, SLTrainer
 from .dpo import DPOTrainer
+from .grpo import GRPOTrainer
 from .kto import KTOTrainer
 from .orpo import ORPOTrainer
 from .ppo import PPOTrainer
@@ -15,4 +16,5 @@ __all__ = [
     "DPOTrainer",
     "ORPOTrainer",
     "KTOTrainer",
+    "GRPOTrainer",
 ]