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/project/src/debugger.rs

@@ -15,7 +15,9 @@ pub mod breakpoint_store;
 pub mod dap_command;
 pub mod dap_store;
 pub mod locators;
+mod memory;
 pub mod session;
 
 #[cfg(any(feature = "test-support", test))]
 pub mod test;
+pub use memory::MemoryCell;