Enhance Accessibility: ARIA Roles & Focus Mgt

[bae080311]

Summary

Improve the library's accessibility for users relying on assistive technologies by properly applying ARIA roles and managing focus during section transitions.

Proposed Solution

Implement ARIA attributes like role="region", aria-current="true" for active sections. Ensure programmatically managed focus adheres to WCAG guidelines, especially for keyboard navigation (building upon #21).

Acceptance Criteria

• Sections correctly announce their status to screen readers.
• Focus management after a section jump is logical and predictable.
• ARIA roles and properties are applied according to best practices.

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