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/task/src/debug_format.rs

@@ -93,6 +93,17 @@ pub struct LaunchRequest {
     pub env: FxHashMap<String, String>,
 }
 
+impl LaunchRequest {
+    pub fn env_json(&self) -> serde_json::Value {
+        serde_json::Value::Object(
+            self.env
+                .iter()
+                .map(|(k, v)| (k.clone(), v.to_owned().into()))
+                .collect::<serde_json::Map<String, serde_json::Value>>(),
+        )
+    }
+}
+
 /// Represents the type that will determine which request to call on the debug adapter
 #[derive(Deserialize, Serialize, PartialEq, Eq, JsonSchema, Clone, Debug)]
 #[serde(rename_all = "lowercase", untagged)]