[Suggestion] Add New Practice Exercise on Python Lists

## Summary
I would like to suggest adding a new beginner-friendly practice exercise focused on Python lists. The current set of exercises covers basic syntax and control flow well, but it would be helpful to have more practice with data structures.

## Proposed Exercise
- **Topic:** Lists
- **Objective:** Given a list of numbers, remove all duplicates and return a sorted list.
- **Example Input:** [3, 1, 2, 3, 4, 2]
- **Expected Output:** [1, 2, 3, 4]

## Why it's useful
- Helps reinforce understanding of list operations like `set()`, `sort()`, and list comprehensions.
- Common use-case for beginners to grasp real-world problems.

## Willing to contribute?
Yes — I’d be happy to submit a pull request with the exercise and its solution.