New commit review flow in project diff view (#25229)

Closes #ISSUE

Release Notes:

- N/A

---------

Co-authored-by: Nate Butler <iamnbutler@gmail.com>

crates/zed/src/zed.rs

@@ -22,6 +22,7 @@ use editor::ProposedChangesEditorToolbar;
 use editor::{scroll::Autoscroll, Editor, MultiBuffer};
 use feature_flags::{FeatureFlagAppExt, FeatureFlagViewExt, GitUiFeatureFlag};
 use futures::{channel::mpsc, select_biased, StreamExt};
+use git_ui::project_diff::ProjectDiffToolbar;
 use gpui::{
     actions, point, px, Action, App, AppContext as _, AsyncApp, Context, DismissEvent, Element,
     Entity, Focusable, KeyBinding, MenuItem, ParentElement, PathPromptOptions, PromptLevel,
@@ -927,6 +928,8 @@ fn initialize_pane(
             toolbar.add_item(syntax_tree_item, window, cx);
             let migration_banner = cx.new(|cx| MigrationBanner::new(workspace, cx));
             toolbar.add_item(migration_banner, window, cx);
+            let project_diff_toolbar = cx.new(|cx| ProjectDiffToolbar::new(workspace, cx));
+            toolbar.add_item(project_diff_toolbar, window, cx);
         })
     });
 }