(fix)mobile: Improve the gallery to improve scale, double tap, and swipe gesture detection (#1502)

* 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

mobile/pubspec.lock

@@ -239,6 +239,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.2.3"
+  easy_image_viewer:
+    dependency: "direct main"
+    description:
+      name: easy_image_viewer
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.2.0"
   easy_localization:
     dependency: "direct main"
     description:
@@ -757,13 +764,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.5.0"
-  photo_view:
-    dependency: "direct main"
-    description:
-      name: photo_view
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.14.0"
   platform:
     dependency: transitive
     description: