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_ui/src/note/mod.rs

@@ -4,7 +4,6 @@ pub mod media;
 pub mod options;
 pub mod reply_description;
 
-use crate::jobs::JobsCache;
 use crate::{app_images, secondary_label};
 use crate::{
     profile::name::one_line_display_name_widget, widgets::x_button, ProfilePic, ProfilePreview,
@@ -14,13 +13,14 @@ use crate::{
 pub use contents::{render_note_contents, render_note_preview, NoteContents};
 pub use context::NoteContextButton;
 use notedeck::get_current_wallet;
-use notedeck::note::MediaAction;
 use notedeck::note::ZapTargetAmount;
 use notedeck::ui::is_narrow;
 use notedeck::Accounts;
 use notedeck::GlobalWallet;
 use notedeck::Images;
+use notedeck::JobsCache;
 use notedeck::Localization;
+use notedeck::MediaAction;
 pub use options::NoteOptions;
 pub use reply_description::reply_desc;