Update queen-attack to be clearer for non-chess players

[mahmoud-moursy]

• Added examples
• Added explanation for why the queens are labelled B and W

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_{Automated comment created by PR Commenter 🤖.}

[SleeplessByte]

Thank you for your submission. These seem very sensible changes.

The description for this exercise is sourced from https://github.com/exercism/problem-specifications/blob/main/exercises/queen-attack/description.md. Would you be so kind to open a PR in that repo so we can determine if this change is nice for all tracks!

Then, we can come back to this PR and actually pull it from there.

[junedev]

@SleeplessByte FYI The issue author already did that: https://github.com/exercism/problem-specifications/pull/1965

[SleeplessByte]

It didn't show up in my notifications list 😅 .

Let's see what happens there 🗡️