Fullscreen MediaViewer refactor

- Moved media related logic into notedeck instead of the ui crate,
  since they pertain to Images/ImageCache based systems

- Made RenderableMedia owned to make it less of a nightmware
  to work with and the perf should be negligible

- Added a ImageMetadata cache to Images. This is referenced
  whenever we encounter an image so we don't have to
  redo the work all of the time

- Relpaced our ad-hoc, hand(vibe?)-coded panning and zoom logic
  with the Scene widget, which is explicitly designed for
  this use case

- Extracted and detangle fullscreen media rendering from inside of note
  rendering.  We instead let the application decide what action they
  want to perform when note media is clicked on.

- We add an on_view_media action to MediaAction for the application to
  handle. The Columns app uses this toggle a FullscreenMedia app
  option bits whenever we get a MediaAction::ViewMedis(urls).

Signed-off-by: William Casarin <jb55@jb55.com>

crates/notedeck_columns/src/ui/profile/mod.rs

@@ -13,12 +13,11 @@ use crate::{
     ui::timeline::{tabs_ui, TimelineTabView},
 };
 use notedeck::{
-    name::get_display_name, profile::get_profile_url, IsFollowing, NoteAction, NoteContext,
-    NotedeckTextStyle,
+    name::get_display_name, profile::get_profile_url, IsFollowing, JobsCache, NoteAction,
+    NoteContext, NotedeckTextStyle,
 };
 use notedeck_ui::{
     app_images,
-    jobs::JobsCache,
     profile::{about_section_widget, banner, display_name_widget},
     NoteOptions, ProfilePic,
 };