Set up Rust debugger code runner tasks (#27571)

## Summary 
This PR starts the process of adding debug task locators to Zed's
debugger system. A task locator is a secondary resolution phase that
allows a debug task to run a command before starting a debug session and
then uses the output of the run command to configure itself.

Locators are most applicable when debugging a compiled language but will
be helpful for any language as well.

## Architecture

At a high level, this works by adding a debug task queue to `Workspace`.
Which add's a debug configuration associated with a `TaskId` whenever a
resolved task with a debug config is added to `TaskInventory`'s queue.
Then, when the `SpawnInTerminal` task finishes running, it emits its
task_id and the result of the ran task.

When a ran task exits successfully, `Workspace` tells `Project` to start
a debug session using its stored debug config, then `DapStore` queries
the `LocatorStore` to configure the debug configuration if it has a
valid locator argument.

Release Notes:

- N/A

crates/debugger_ui/src/session/inert.rs

@@ -159,6 +159,8 @@ impl Render for InertState {
                             }),
                             tcp_connection: Some(TCPHost::default()),
                             initialize_args: None,
+                            args: Default::default(),
+                            locator: None,
                         },
                     });
                 } else {
@@ -319,6 +321,8 @@ impl InertState {
             adapter: kind,
             request: DebugRequestType::Attach(task::AttachConfig { process_id: None }),
             initialize_args: None,
+            args: Default::default(),
+            locator: None,
             tcp_connection: Some(TCPHost::default()),
         };
 

crates/debugger_ui/src/tests/attach_modal.rs

@@ -89,6 +89,8 @@ async fn test_show_attach_modal_and_select_process(
                         label: "attach example".into(),
                         initialize_args: None,
                         tcp_connection: Some(TCPHost::default()),
+                        locator: None,
+                        args: Default::default(),
                     },
                     vec![
                         Candidate {