Option to save frames to disk in video recorder

[rk1a]

Description

• Adds constructor flag frames_to_disk to VideoRecorder and RecordVideo wrapper. Disabled by default.
• If enabled write frames to image files in subfolder of video_folder. This step depends on imageio.
• On closing the video recorder frames are loaded on the fly by moviepy reducing the memory footprint.
• Saved frames are deleted after the video has been created.

Fixes #714

Type of change

• New feature (non-breaking change which adds functionality)

Checklist:

• I have run the pre-commit checks with pre-commit run --all-files (see CONTRIBUTING.md instructions to set it up)
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[pseudo-rnd-thoughts]

We are removing monitoring/video_recorder in v1.0.0 to RecordVideo wrapper. Could you update the PR to use branch v1.0.0 and include a docstring example

[pseudo-rnd-thoughts]

Amazing, thanks.
I'm impressed that we don't need to change the clip saving needs to be changed and the moviepy works with a list of strings

[pseudo-rnd-thoughts]

For some reason the CI isn't running / showing up, therefore, I'm going to approve and see if it passes

[pseudo-rnd-thoughts]

@rk1a Could you make a follow up PR that fixes the CI issues? https://github.com/Farama-Foundation/Gymnasium/actions/runs/6248041856