`expand` options can be implemented

[shahryarjb]

1. :drawer — Instead of expanding inline below the row, slides a side panel from the right. Good for showing
   detailed forms or lots of content without pushing rows down.
2. :modal — Opens a centered modal overlay with the expanded content. Better for focused viewing when you don't need
   to see the table behind it.
3. :popover — Small floating card that appears near the row on click. Good for quick previews (e.g., showing a
   thumbnail or summary) without heavy layout shifts.

Each would still use the same {:expand_row, id} → expanded_html flow from the parent LiveView, just different UI for displaying the result. The ▶ first-cell trigger would stay the same.