Enable reload of images in image viewer (#20374)

Closes #11529

Release Notes:

- Fixed an issue where the image preview would not update when the
underlying file changed

---------

Co-authored-by: Bennet <bennet@zed.dev>

crates/language/src/buffer.rs

@@ -413,9 +413,12 @@ pub trait LocalFile: File {
     /// Returns the absolute path of this file
     fn abs_path(&self, cx: &AppContext) -> PathBuf;
 
-    /// Loads the file's contents from disk.
+    /// Loads the file contents from disk and returns them as a UTF-8 encoded string.
     fn load(&self, cx: &AppContext) -> Task<Result<String>>;
 
+    /// Loads the file's contents from disk.
+    fn load_bytes(&self, cx: &AppContext) -> Task<Result<Vec<u8>>>;
+
     /// Returns true if the file should not be shared with collaborators.
     fn is_private(&self, _: &AppContext) -> bool {
         false