debugger: Add ability to only show stack frame entries from visible work trees (#37061)

This PR adds a toggleable filter to the stack frame list that filters
out entries that don't exist within a user's project (visible work
trees). This works by keeping a vector of entry indices that exist
within a user's project and updates the list state based on these
entries when filtering the list.

I went with this approach so the stack frame list wouldn't have to
rebuild itself whenever the filter is toggled and it could persist its
state across toggles (uncollapsing a collapse list). It was also easier
to keep track of selected entries on toggle using the vector as well.

### Preview

https://github.com/user-attachments/assets/d86c7485-c885-4bbb-bebb-2f6385674925



Release Notes:

- debugger: Add option to only show stack frames from user's project in
stack frame list

crates/debugger_ui/src/debugger_ui.rs

@@ -85,6 +85,10 @@ actions!(
         Rerun,
         /// Toggles expansion of the selected item in the debugger UI.
         ToggleExpandItem,
+        /// Toggle the user frame filter in the stack frame list
+        /// When toggled on, only frames from the user's code are shown
+        /// When toggled off, all frames are shown
+        ToggleUserFrames,
     ]
 );
 
@@ -272,12 +276,25 @@ pub fn init(cx: &mut App) {
                     }
                 })
                 .on_action({
+                    let active_item = active_item.clone();
                     move |_: &ToggleIgnoreBreakpoints, _, cx| {
                         active_item
                             .update(cx, |item, cx| item.toggle_ignore_breakpoints(cx))
                             .ok();
                     }
                 })
+                .on_action(move |_: &ToggleUserFrames, _, cx| {
+                    if let Some((thread_status, stack_frame_list)) = active_item
+                        .read_with(cx, |item, cx| {
+                            (item.thread_status(cx), item.stack_frame_list().clone())
+                        })
+                        .ok()
+                    {
+                        stack_frame_list.update(cx, |stack_frame_list, cx| {
+                            stack_frame_list.toggle_frame_filter(thread_status, cx);
+                        })
+                    }
+                })
             });
     })
     .detach();