Enhance Difficulty Representation with Stars and Text Options

[teogor]

This pull request introduces new methods to represent difficulty levels using both stars and text labels.

Changes

• Added a toStars() method to the Difficulty enum to convert a difficulty level to a string representation using stars.
• Added a toLabel() method to the Difficulty enum to convert a difficulty level to a string representation using the provided array of difficulty labels.

Benefits

• These methods provide flexibility in displaying difficulty levels in different contexts and enhance the overall readability of the code.

Code Examples

• Converting difficulty level to stars:

val difficulty = Difficulty.Medium
val starsRepresentation = difficulty.toStars()
println("Difficulty level in stars: $starsRepresentation")

• Converting difficulty level to text:

val difficultyLabels = arrayOf("Easy", "Medium", "Hard")
val difficulty = Difficulty.Medium
val textRepresentation = difficulty.toLabel(difficultyLabels)
println("Difficulty level in text: $textRepresentation")