* Make panels collapsible
- Add Panel component with collapse logic
- Use the component in all the necessary panel groups
* Remove unnecessary container from PanelCanvas
* Add "hide property" to Pane component to hide Panel contents using a prop
- Instead of doing conditional rendering, pass the condition to Panel as props
* Change collapse icon rotation for closed
- Use one icon and use CSS transforms to rotate it
* Remove unnecessary imports from PanelSelection
