Move workspace::toast_layer::RunAction to zed_actions::toast::RunAction (#32222)

Cleaner to have references to this be `toast::RunAction` matching how it
appears in the keymap, instead of `workspace::RunAction`.

Release Notes:

- N/A

crates/zed_actions/src/lib.rs

@@ -154,6 +154,12 @@ pub mod jj {
     actions!(jj, [BookmarkList]);
 }
 
+pub mod toast {
+    use gpui::actions;
+
+    actions!(toast, [RunAction]);
+}
+
 pub mod command_palette {
     use gpui::actions;