Reflexion Agent implementation?
### Feature request

Reflexion: Language Agents with Verbal Reinforcement Learning (https://arxiv.org/abs/2303.11366) has code in  https://github.com/noahshinn024/reflexion, can you integrate it into transformers_agents?

### Motivation

Reflexion Agent is a very interesting advanced agent, and already has its code open sourced, can it be easy to integrate it into transformers_agents?

### Your contribution

Currently no.