text: Title: [Proposal] Inclusion of ActionRepeat wrapper
  Body: ### Proposal
  
  I would like to propose `ActionRepeat` wrapper that would allow the wrapped environment to repeat `step()` for the specified number of times.
  
  ### Motivation
  
  I am working on implementing models like PlaNet and Dreamer, and I'm working with MuJoCo environments mostly. In these implementations, there is almost always a term like `action_repeat`. I think the proposed wrapper would simplify this line of implementation.
  
  ### Pitch
  
  Assuming that the overridden `step()` is called at time-step `t`, it would return the followings
  
  > `observation[t + n_repeat], sum(reward[t: t + n_repeat + 1]), terminated, truncated, info[t + n_repeat]`
  
  That means, the overridden `step()` would call the parent `step()` at least once and it would assert that `n_repeat` is positive (>=0).
  
  If `terminal` or `truncation` is reached within the action repetition, the loop would be exited, and the reward would be summed unto that point while observation and info from that time step would be returned.
  
  ### Alternatives
  
  _No response_
  
  ### Additional context
  
  _No response_
  
  ### Checklist
  
  - [X] I have checked that there is no similar [issue](https://github.com/Farama-Foundation/Gymnasium/issues) in the repo
  