debugger: Fix the JavaScript debug terminal scenario (#33924)

There were a couple of things preventing this from working:

- our hack to stop the node REPL from appearing broke in recent versions
of the JS DAP that started passing `--experimental-network-inspection`
by default
- we had lost the ability to create a debug terminal without specifying
a program

This PR fixes those issues. We also fixed environment variables from the
**runInTerminal** request not getting passed to the spawned program.

Release Notes:

- Debugger: Fix RunInTerminal not working for JavaScript debugger.

---------

Co-authored-by: Cole Miller <cole@zed.dev>

crates/vim/src/command.rs

@@ -1688,7 +1688,7 @@ impl ShellExec {
                     id: TaskId("vim".to_string()),
                     full_label: command.clone(),
                     label: command.clone(),
-                    command: command.clone(),
+                    command: Some(command.clone()),
                     args: Vec::new(),
                     command_label: command.clone(),
                     cwd,