[.gitignore] To ignore pushing few files/folders while updating the fork.

[vaibhshah]

Hi, Could improve this action by adding a ignore feature to it.

In some use cases, no one needs exact two repos with the same code. In fork repos we want to skip the push of few files/folder which we don't need there in forks. Giving paths of such folders/files while using the action can made this work. But some adjustments need to be done to bring thing functionality.

May be someone can pick this interesting usecase.