fix: fixed nested on tap to work with tile expansion

[iamwaseemsh]

Our tree node has own onTap therefore when i was tapping on a node element it was not being expanded because our node's onTap was being called. Therefore, there were multiple onTap in child parent flow, i have added RawGestureDetector now both onTap animated_tree_view's internal ontap and any node's custom ontap are working.