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/gpui/src/elements/div.rs

@@ -903,7 +903,7 @@ pub trait InteractiveElement: Sized {
     /// Apply the given style when the given data type is dragged over this element
     fn drag_over<S: 'static>(
         mut self,
-        f: impl 'static + Fn(StyleRefinement, &S, &Window, &App) -> StyleRefinement,
+        f: impl 'static + Fn(StyleRefinement, &S, &mut Window, &mut App) -> StyleRefinement,
     ) -> Self {
         self.interactivity().drag_over_styles.push((
             TypeId::of::<S>(),