debug: Launch custom commands from start modal (#32484)

Release Notes:

- Add custom command launching from the `debug: start` modal

---------

Co-authored-by: Anthony Eid <hello@anthonyeid.me>

crates/project/src/debugger/locators/python.rs

@@ -22,7 +22,7 @@ impl DapLocator for PythonLocator {
         resolved_label: &str,
         adapter: DebugAdapterName,
     ) -> Option<DebugScenario> {
-        if adapter.as_ref() != "Debugpy" {
+        if adapter.0.as_ref() != "Debugpy" {
             return None;
         }
         let valid_program = build_config.command.starts_with("$ZED_")