Feature Request: Support for onLongPress Action

[neffex97]

Hello!

First of all, thanks for the great work on the flutter_bouncable package. It’s been incredibly useful for creating interactive UI elements with smooth animations.

However, I’ve encountered a use case where I need the ability to handle a onLongPress action, which is currently not supported. Having an onLongPress callback would be beneficial in many scenarios, such as showing context menus, triggering secondary actions, or providing additional functionality based on a prolonged interaction.