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/media_upload.rs

@@ -11,7 +11,7 @@ use sha2::{Digest, Sha256};
 use url::Url;
 
 use crate::Error;
-use notedeck_ui::images::fetch_binary_from_disk;
+use notedeck::media::images::fetch_binary_from_disk;
 
 pub const NOSTR_BUILD_URL: fn() -> Url = || Url::parse("http://nostr.build").unwrap();
 const NIP96_WELL_KNOWN: &str = ".well-known/nostr/nip96.json";
@@ -143,7 +143,7 @@ pub fn nip96_upload(
         Err(e) => {
             return Promise::from_ready(Err(Error::Generic(format!(
                 "could not read contents of file to upload: {e}"
-            ))))
+            ))));
         }
     };