fix: add proper aria-live region for dynamic content updates

[Douglas4tech]

Summary

Closed: #82

I have fixed the accessibility issue in the waitlist form by adding a proper aria-live region to ensure screen reader users are notified of success and error states.

Type of Change

• [ x] Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Chore or Refactoring

Checklist

• [ x] I have read the CONTRIBUTING.md guidelines.
• [x ] My commits follow the Conventional Commits specification.
• [x ] My commits are atomic and represent singular logical changes.
• [ x] I have self-reviewed my own code.
• [ x] I have tested my changes locally and verified they pass linting and builds.
• I have attached a screen recording (mandatory for UI changes).

Screen Recording / Screenshots

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@Douglas4tech Great news! 🎉 Based on an automated assessment of this PR, the linked Wave issue(s) no longer count against your application limits.

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[Douglas4tech]

@pragmaticAweds pls merge

[pragmaticAweds]

Please attache a screen recording (mandatory for UI to avoid breaking)

Also, the CI is not passing

Do this for approval.