🎨 Palette: Add accessibility info to Status Bar Item

[raccioly]

💡 What
Added explicit accessibilityInformation (with label and role) to the VS Code StatusBarItem that displays the CDD Score. It now dynamically updates the spoken label for screen readers whenever the score is refreshed or an error occurs.

🎯 Why
The CDD score status bar item relied on shorthand text (like $(shield) CDD: 85/100) and icons to convey state. Without explicit accessibility information, screen readers lack the full context of what the item represents and what the different states mean.

📸 Before/After
Before: Screen reader reads "shield CDD 85 slash 100".
After: Screen reader reads "CDD Score is 85 out of 100. Status: Good" (button).

♿ Accessibility

• Set role: 'button' to clarify interactive capability.
• Added dynamic label that translates the shorthand score and icons into descriptive natural language for screen readers.

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PR created automatically by Jules for task 12294168167698730707 started by @raccioly

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