enhance: Monster::getDanceStep code duplication

[dudantas]

Description

Refactored the getDanceStep function to avoid code duplication by introducing a helper function tryAddDirection. This change improves code readability and maintainability by reducing repetitive logic.

Changed: • From push_back to emplace_back • From std::shuffle to std::ranges::shuffle

Behaviour

Actual

The getDanceStep function had repetitive logic for adding directions to the dirList.

Expected

The getDanceStep function uses a helper function to encapsulate the repetitive logic, making the code more concise and easier to maintain.

Type of change

• [x] Code refactoring (non-breaking change which improves the code structure)

Checklist

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [x] I checked the PR checks reports
• [x] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [ ] I have added tests that prove my fix is effective or that my feature works