Add aria-labels to improve accessibility across UI components

[riya-kaurav]

Summary

Adds aria-label attributes to interactive elements to improve accessibility and screen reader support.

Changes

• Added aria-label to search input and controls in GraphView
• Added aria-label to NavigationBar elements (theme toggle, GitHub link, docs link, schema format selector)
• Added aria-label to popup controls in NodeDetailsPopup
• Added aria-label to fullscreen toggle button

Result

Improves accessibility and better WCAG compliance for screen readers.

Closes #141

[itvi-1234]

Hi @riya-kaurav , Thank you so much for raising the PR , It seems we are facing some merge conflicts here . We are currently at version 0.5.11-beta and you are at 0.5.6-beta (it means some of the PR's get merged but that changes are not reflecting in your codebase, right) Now what you can do is resole the merge conflicts
git fetch upstream
git merge upstream/main
may help 🚀

[itvi-1234]

Version bump is required