Replace hardcoded aria-labels with i18n

[avinxshKD]

Fixes #3849

Replaced hardcoded English aria-labels with i18n translations to support localization.

Changes:

• Pagination: aria-label="Previous Page" - t('Pagination.PreviousPageARIA')
• VersionPicker: aria-label="Select p5.js version" - t('Toolbar.SelectVersionARIA')
• Toast: aria-label="Close Alert" - t('Toast.CloseAlertARIA')
• TextArea: aria-label="Copy" - t('TextArea.CopyARIA')
• QuickAddList/Icons: Fixed incorrect "Descending" labels, now uses ButtonRemoveARIA/ButtonAddToCollectionARIA

All new keys added to translations/locales/en-US/translations.json following the existing *ARIA naming convention

Checklist:

• has no linting errors (npm run lint)
• has no test errors (npm run test)
• has no typecheck errors (npm run typecheck)
• is from a uniquely-named feature branch and is up to date with the develop branch
• is descriptively named and links to an issue number
• meets accessibility guidelines

[avinxshKD]

@raclim pls take a look into this, let me know if any adjustments needed thanks

[yugalkaushik]

LGTM

[avinxshKD]

@yugalkaushik thanks for the review
can you pls take a look into this too? #3861 i wanna know if any adjustments needed or its ready to merge, thanks