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/dap_adapters/src/javascript.rs

@@ -1,9 +1,10 @@
 use adapters::latest_github_release;
 use anyhow::Context as _;
+use collections::HashMap;
 use dap::{StartDebuggingRequestArguments, adapters::DebugTaskDefinition};
 use gpui::AsyncApp;
 use serde_json::Value;
-use std::{collections::HashMap, path::PathBuf, sync::OnceLock};
+use std::{path::PathBuf, sync::OnceLock};
 use task::DebugRequest;
 use util::{ResultExt, maybe};
 
@@ -70,6 +71,8 @@ impl JsDebugAdapter {
         let tcp_connection = task_definition.tcp_connection.clone().unwrap_or_default();
         let (host, port, timeout) = crate::configure_tcp_connection(tcp_connection).await?;
 
+        let mut envs = HashMap::default();
+
         let mut configuration = task_definition.config.clone();
         if let Some(configuration) = configuration.as_object_mut() {
             maybe!({
@@ -110,6 +113,12 @@ impl JsDebugAdapter {
                 }
             }
 
+            if let Some(env) = configuration.get("env").cloned() {
+                if let Ok(env) = serde_json::from_value(env) {
+                    envs = env;
+                }
+            }
+
             configuration
                 .entry("cwd")
                 .or_insert(delegate.worktree_root_path().to_string_lossy().into());
@@ -158,7 +167,7 @@ impl JsDebugAdapter {
             ),
             arguments,
             cwd: Some(delegate.worktree_root_path().to_path_buf()),
-            envs: HashMap::default(),
+            envs,
             connection: Some(adapters::TcpArguments {
                 host,
                 port,