feat(notebooks): add Kaggle 1xT4 GRPO notebook and refresh 2xT4 sibling

feat(kaggle nb): integrate Liger-Kernel for fused Triton kernels on 2xT4

feat(notebooks): add Kaggle 2x T4 GRPO training notebook

chore(noise): silence ToolError WARNING spam and Qwen max_length warnings

env added

notebook

assets added

phase-1