Add OS file drop event handler

Co-Authored-By: Nathan Sobo <nathan@zed.dev>

crates/ui2/src/components/workspace.rs

@@ -179,8 +179,6 @@ impl Workspace {
 
         let color = ThemeColor::new(cx);
 
-        dbg!(color);
-
         // HACK: This should happen inside of `debug_toggle_user_settings`, but
         // we don't have `cx.global::<FakeSettings>()` in event handlers at the moment.
         // Need to talk with Nathan/Antonio about this.