Image viewer (#9425)

This builds on #9353 by adding an image viewer to Zed. Closes #5251.

Release Notes:

- Added support for rendering image files
([#5251](https://github.com/zed-industries/zed/issues/5251)).

<img width="1840" alt="image"
src="https://github.com/zed-industries/zed/assets/836375/3bccfa8e-aa5c-421f-9dfa-671caa274c3c">

---------

Co-authored-by: Mikayla Maki <mikayla@zed.dev>

crates/zed/Cargo.toml

@@ -46,6 +46,7 @@ fs.workspace = true
 futures.workspace = true
 go_to_line.workspace = true
 gpui.workspace = true
+image_viewer.workspace = true
 install_cli.workspace = true
 isahc.workspace = true
 journal.workspace = true