Add support for displaying remaining character count in rc-input

[roanjain]

Currently, the rc-input package only provides support for displaying the character count of the provided input. It would be helpful to have the ability to switch to display the remaining character count also. This would be especially useful for situations where a user is limited to a specific number of characters, such as in form inputs or text areas.

I am requesting that support for displaying the remaining character count be added to the rc-input package. This would be a valuable addition to the package.

Thank you for considering this feature request.