Parse env vars and args from debug launch editor (#30538)

Release Notes:

- debugger: allow setting env vars and arguments on the launch command.

---------

Co-authored-by: Cole Miller <m@cole-miller.net>
Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com>

crates/dap_adapters/src/javascript.rs

@@ -36,6 +36,9 @@ impl JsDebugAdapter {
                 if !launch.args.is_empty() {
                     map.insert("args".into(), launch.args.clone().into());
                 }
+                if !launch.env.is_empty() {
+                    map.insert("env".into(), launch.env_json());
+                }
 
                 if let Some(stop_on_entry) = config.stop_on_entry {
                     map.insert("stopOnEntry".into(), stop_on_entry.into());