debugger: Add memory view (#33955)

This is mostly setting up the UI for now; I expect it to be the biggest
chunk of work.

Release Notes:

- debugger: Added memory view

---------

Co-authored-by: Anthony Eid <hello@anthonyeid.me>
Co-authored-by: Mikayla Maki <mikayla.c.maki@gmail.com>
Co-authored-by: Mikayla Maki <mikayla@zed.dev>

crates/debugger_ui/src/tests/module_list.rs

@@ -111,7 +111,6 @@ async fn test_module_list(executor: BackgroundExecutor, cx: &mut TestAppContext)
         });
 
     running_state.update_in(cx, |this, window, cx| {
-        this.ensure_pane_item(DebuggerPaneItem::Modules, window, cx);
         this.activate_item(DebuggerPaneItem::Modules, window, cx);
         cx.refresh_windows();
     });