Fix: accessible community cloud screen

[rami-elementor]

This pull request focuses on improving accessibility across the community cloud and snippets management UI, particularly for screen readers. The changes add ARIA roles, labels, and screen-reader-only text to various interactive elements and status indicators. Additionally, some minor code cleanups and enhancements to user feedback are included.

Accessibility improvements:

• Added aria-current="page" to navigation tabs and status filters to indicate the current selection for assistive technologies in CommunityCloud.tsx, SnippetsListTable.tsx, and SnippetsTable.tsx.
• Improved live region announcements and roles for search status, error, and no-results banners in CloudSearch.tsx, ensuring screen readers are notified of dynamic content changes.
• Enhanced the snippets table with a live region announcing the number of found snippets, added ARIA labels for the table and checkboxes, and improved the tag filter with labels and ARIA attributes in SnippetsListTable.tsx.
• Updated interactive controls such as switches and buttons to use appropriate roles, ARIA attributes, and screen-reader text, including the "Run Once" button and activation switch in TableColumns.tsx.
• Improved the display of vote counts and tooltips for screen readers in SearchResults.tsx and TableColumns.tsx.

Code and usability enhancements:

• Added missing imports (_n, getSnippetDisplayName) to support pluralization and improved ARIA labeling in SnippetsListTable.tsx.
• Fixed list rendering in status filters to ensure proper markup in SnippetsListTable.tsx.

[sheabunge]

should this be interpolated with sprintf? 'votes' by itself doesn't really make sense without the number attached. Also, this code as-is will not include a space between the numeral and the text (e.g. it'll appear as 4votes).

[rami-elementor]

No, we should not use sprintf() here because the number is visible and the text is not.