feature/useFocusTrap: Support focusable tab cycles in Modal (Update of PR #3075)

[Pragadesh-45]

fixes: #2076

Description

This PR updates #3075 to improve focus management within the modal. It ensures that focus is restricted to elements within the modal when it contains at least one focusable element. The approach follows guidance from Stack Overflow to confine focus to internal elements only.

This is the Reference to this specific implementation: Keep tabbing within modal pane only

Key Changes:

• Added focus trapping within the modal to restrict focus to internal elements.
• Adjusted tabindex to hide non-focusable elements outside the modal.
• Set initial focus to the first focusable element within the modal.
• Implemented focus looping between the first and last focusable elements.
• Restored original tabindex values and optimized the code for clarity and performance.

Contribution Checklist:

• The pull request addresses only one issue or adds one feature.
• The pull request does not introduce any breaking changes.
• I have read the contribution guidelines.
• The issue has been created and linked to this pull request.

[helloanoop]

Thank you @Pragadesh-45 !