split ImageList to generate train and test sets

[LIEeOoNn]

Is your feature request related to a problem?

we wanted to generate a test set but couldn't do it so quickly and also for some reason when we created our own image but its had some confusion issues till it worked

Desired solution

it should have a spit function like

def split_imageList(self, split_ratio: float)-> tuple[train: ImageList, test: ImageList]:
# it should convert the ImageList into List[Image] with ImageList.to_images() 
# and then shuffle and split the list and use ImageList.from_images(image_list) 
# to convert them both back into an ImageList and return the tuple```

### Possible alternatives (optional)

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### Screenshots (optional)

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### Additional Context (optional)

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[lars-reimann]

🎉 This issue has been resolved in version 0.27.0 🎉

The release is available on:

• v0.27.0
• GitHub release

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