* Rolling number POC, convert page index
* Refine
* Improve
* Comments
* Refine Comments
* Bigger number is from top
* Prepare to make content moveable
* Make content index reversed
* Use moveableContentOf
* Increase interval
* Fix calculation
* Fix calculation again
* Extract
* Refine
* Use zero-sized placeholder
* Fix width
* Allow RollingNumber have fixed width
* Improve comments
* Make moveableContent initialized lazily
* Reverse direction
* Avoid movableContentOf if width fixed
* Use Arrangement.spacedBy
* Improve animation
* Refine
* Fix comment
* Fix padding
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Co-authored-by: Dude so hot <djohn@fbi.gov>