Recursive tab/pane closing on folder deletion (#15222)

Release Notes:

- Added tab/pane closing for files inside a folder being deleted/trashed

Behavior prior:

[Screencast from 2024-07-25
16-26-47.webm](https://github.com/user-attachments/assets/b090f582-bd7e-411d-91b9-d6709aca7295)

New behavior:

[Screencast from 2024-07-25
16-27-53.webm](https://github.com/user-attachments/assets/b35d4c3a-b0ab-4bd3-bcee-e8b6ad1419c3)

This is primarily a proof of concept PR as I'm sure there are more
elegant ways of achieving this. It's been bothering me for a little
while manually closing file tabs in a folder I deleted, and since this
is standard behavior on almost all IDEs and text editors I figured it
would be a nice small little challenge. If there are any changes y'all
want made I'd be happy to.

crates/worktree/src/worktree.rs

@@ -743,10 +743,31 @@ impl Worktree {
             Worktree::Local(this) => this.delete_entry(entry_id, trash, cx),
             Worktree::Remote(this) => this.delete_entry(entry_id, trash, cx),
         }?;
-        cx.emit(Event::DeletedEntry(entry_id));
+
+        let entry = match self {
+            Worktree::Local(ref this) => this.entry_for_id(entry_id),
+            Worktree::Remote(ref this) => this.entry_for_id(entry_id),
+        }?;
+
+        let mut ids = vec![entry_id];
+        let path = &*entry.path;
+
+        self.get_children_ids_recursive(path, &mut ids);
+
+        for id in ids {
+            cx.emit(Event::DeletedEntry(id));
+        }
         Some(task)
     }
 
+    fn get_children_ids_recursive(&self, path: &Path, ids: &mut Vec<ProjectEntryId>) {
+        let children_iter = self.child_entries(path);
+        for child in children_iter {
+            ids.push(child.id);
+            self.get_children_ids_recursive(&child.path, ids);
+        }
+    }
+
     pub fn rename_entry(
         &mut self,
         entry_id: ProjectEntryId,