* Remove `onFocus` and `onBlur` handlers
react-resizable-panels fixed the issue where focus-visible was not
working as expected, so we no longer need this bit of code.
* Implement new hover/focus separator
* Collapse the panel when clicking on the new focus separator
* Remove `isFocusedViaKeyboard` from snapshot
* Update tests and storybook
* Expand panel only on double click
* Add animation
* Fix tests
* Don't render border when type is bar
* Single click to expand, double click to collapse
* Change focus separator color