[feat]: List of unique element

[Parvezkhan0]

Write a Python function unique_sublists(lst) that takes a list lst and returns a list of all unique sublists. A sublist is a contiguous subsequence of a list. The order of elements should be preserved.

[Parvezkhan0]

@laviii123 I want to work on this issue as a part of my hacktoberfest contribution

[Ashima2003]

I wish to contribute. Kindly assign me this issue.