debugger: Remember pane layout from previous debugger session (#28692)

This PR makes a debugger's pane layout persistent across session's that
use the same debug adapter.

Release Notes:

- N/A

---------

Co-authored-by: Piotr Osiewicz <24362066+osiewicz@users.noreply.github.com>
Co-authored-by: Cole Miller <m@cole-miller.net>

crates/debugger_ui/Cargo.toml

@@ -28,6 +28,7 @@ client.workspace = true
 collections.workspace = true
 command_palette_hooks.workspace = true
 dap.workspace = true
+db.workspace = true
 editor.workspace = true
 feature_flags.workspace = true
 futures.workspace = true