🎨 Palette: Make dynamic score updates accessible to screen readers

[EiJackGH]

💡 What

Added aria-live="polite" and aria-atomic="true" attributes to the #score div in src/views/mario-game.njk.

🎯 Why

In the current implementation, the score increments visually as Goombas are defeated, but screen readers are unaware of these updates. This change ensures that screen reader users receive dynamic feedback when the score changes without disrupting the game flow.

📸 Before/After

(Visuals remain unchanged, but the DOM structure is updated to support accessibility.)
Before: <div id="score">Score: 0</div>
After: <div id="score" aria-live="polite" aria-atomic="true">Score: 0</div>

♿ Accessibility

• aria-live="polite": Informs the screen reader to announce updates at the next graceful opportunity, avoiding interruption of current speech.
• aria-atomic="true": Ensures the screen reader announces the entire region (e.g., "Score: 1") rather than just the changed character, providing clear context.

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PR created automatically by Jules for task 5607166680208367396 started by @EiJackGH

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