* photoviewgallery
* stiffer scrolling to react more like google photos
* adds a dx threshhold for the swipe/up down from the original dropped point
* stopped wrapping imageview in gallery viewer to avoid the double photoview issue. breaks imageview page pinch-to-zoom, so i need to fix that for other callers
* refactors gallery view to use remoteimage directly and breaks imageviewpage
* removed image_viewer_page
* adds minscale
* adds photo_view to repository
* double tap to zoom out with hacked commit
* double tapping!
* got up and down swipe gestures working
* fixed wrong cache and headers in image providers
* fixed image quality and added videos back in
* local loading asset image fix
* precaches images
* fixes lint errors
* deleted remote_photo_view and more linters
* fixes scale
* load preview and load original
* precache does original / preview as well
* refactored image providers to nice functions and added JPEG thumbnail format to remote image thumbnail lookup
* moved photo_view to shared/ui/
* three stage loading with webp and fixes some thumbnail fits
* fixed local thumbnail
* fixed paging in iOS
