Support selecting and copying text within table cells #1100

I'd like to select a piece of text inside a Markdown table cell, such as a command, filename, or phrase, and copy only that selection.

<EnrichedMarkdownText
  flavor="github"
  selectable
  markdown={`
| Service | Details |
| --- | --- |
| API | Restart with systemctl restart api |
`}
/>

Expected behavior: Long-pressing systemctl starts native text selection. I can drag the selection handles to select systemctl restart api and copy just that text.

Current behavior: Long-pressing offers whole-table Copy / Copy as Markdown actions. Individual words or substrings inside cells cannot be selected, even with selectable={true}.

This would be useful in chat interfaces where responses contain tables with commands, paths, identifiers, or longer descriptions.

This request is for text selection within table cells on iOS and Android.