misc: playing with rl/verifiers

[ErikBjare]

Didn't get it to run, was just vibecoding with gptme.

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[!IMPORTANT] Adds gptme_verifiers.py to implement an RL environment for training LLMs using gptme and verifiers, with classes for tool execution, state management, and reward calculation.

• New Script:
  • Adds gptme_verifiers.py to implement an RL environment for training LLMs with gptme and verifiers.
• Classes:
  • GPTMeRLEnv: Manages RL environment, tool execution, and reward calculation.
  • ToolResult, State: Define types for tool execution results and environment state.
  • ToolUseReward, TaskReward: Define reward structures for tool usage and task completion.
• Functions:
  • reset(), step(), _execute_tool(), _calculate_tool_reward(), _calculate_task_reward(), _get_observation(), _is_done(): Manage environment lifecycle and reward logic.
  • main(): Demonstrates example usage of the environment.

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