[ADD PACKAGE] carousel_slider_plus

[kishan-dhankecha]

• carousel_slider_plus
• https://pub.dev/packages/carousel_slider_plus
• Onboarding Carousel, Carousel or Cover Flow
• Fork of carousel_slider which is not maintained anymore

[ashitaprasad]

Thanks for submitting the package @kishan-dhankecha. Will close this issue once it is live on the website after review.