Feature Request: Add Arrow Icon for Collapsing and Uncollapsing Split Pane

[HarshitSahu8]

Description:
I would like to propose a feature enhancement for the devbookhq/splitter library to add an arrow icon that can indicate and trigger the collapsible state of the split panes.

Use Case:
Currently, when using the devbookhq/splitter library, there is no built-in visual indicator for showing whether a split pane is collapsed or expanded. Adding an arrow icon that points left when a pane is collapsed and right when it's expanded would greatly improve the user experience and make it more intuitive for users to interact with collapsible split panes.

like this:

Expected Behavior:
When a split pane is collapsed, the arrow icon should point left (◄), indicating that clicking on the icon will expand the pane. When the pane is expanded, the arrow icon should point right (►), indicating that clicking on the icon will collapse the pane.

Additional Information:

• I believe this feature would enhance the usability and user experience of the devbookhq/splitter library by providing a clear visual indication of the collapsible state of split panes.

• This feature aligns well with the common UX patterns seen in other UI libraries and applications.

• The proposed solution is backwards compatible, as it introduces a new prop that can be optionally used.

Thank you for considering this feature request. I believe that adding the arrow icon functionality will make the devbookhq/splitter library even more user-friendly and valuable for developers. If there are any questions or concerns about the implementation, I'm happy to discuss further.