* Restructure frame output
* Reboot JSComponent when ref changes
* Prune outputs from LV, handle frame and stdout updates via component messaging
* Keep ANSI modifiers as keyword list
* Don't re-render pruned outputs
* Improve empty frame styling
* Use more specific id
* Add clarification on trailing CR
* Handle output group borders with CSS
* Keep only relevant outputs in memory
* Adjust borders
* Update lib/livebook/live_markdown/import.ex
Co-authored-by: José Valim <jose.valim@dashbit.co>
* Apply review comments
Co-authored-by: José Valim <jose.valim@dashbit.co>
* Implement cells bin
* Temporarily keep cells source
* Send complete bin entries from session to clients when a cell gets removed
* Polish styles
* Hydrate bin entries on section deletion as well
* Show all sections and enable cross-section focus navigation
* Move focus to the client
* Add shortcut for evaluating all cells
* Fix and expand tests
* Make section links scroll to the given section
* Virtualize output lines
* Remove unused dependency
* Remove VirtualizedLinesComponent
* Pass lines as HTML nodes and use as template
* Validate hook children
* Refactor markup
