🎨 Palette: [UX improvement] add accessibilityInformation to VS Code status bar item

[raccioly]

💡 What: Added accessibilityInformation to the VS Code StatusBarItem to ensure that screen readers can correctly interpret the status bar content. This updates dynamically whenever the text or tooltip is changed (e.g. during a score refresh or an error state).
🎯 Why: Status bar items relying on shorthand text (CDD: 85/100) and icons ($(shield)) lack context for screen reader users. Adding explicit labels transforms raw text into spoken phrases like "CDD Score: 85 out of 100, Grade B, Good", greatly improving accessibility for visually impaired developers.
📸 Before/After: Visual change is not present, changes are purely for screen-reader/assistive technologies.
♿ Accessibility: Ensures that StatusBarItem has a descriptive label and a clear role (button) to announce the current Canonical-Driven Development score comprehensively rather than parsing plain text strings.

---

PR created automatically by Jules for task 7941747546161338341 started by @raccioly

[google-labs-jules]

👋 Jules, reporting for duty! I'm here to lend a hand with this pull request.

When you start a review, I'll add a 👀 emoji to each comment to let you know I've read it. I'll focus on feedback directed at me and will do my best to stay out of conversations between you and other bots or reviewers to keep the noise down.

I'll push a commit with your requested changes shortly after. Please note there might be a delay between these steps, but rest assured I'm on the job!

For more direct control, you can switch me to Reactive Mode. When this mode is on, I will only act on comments where you specifically mention me with @jules. You can find this option in the Pull Request section of your global Jules UI settings. You can always switch back!

New to Jules? Learn more at jules.google/docs.

---

For security, I will only act on instructions from the user who triggered this task.