Truncate multi-line debug value hints (#34305)

Release Notes:

- Multi-line debug inline values are now truncated.

Co-authored-by: Anthony Eid <hello@anthonyeid.me>

crates/debugger_ui/src/tests/inline_values.rs

@@ -2241,3 +2241,34 @@ func main() {
     )
     .await;
 }
+
+#[gpui::test]
+async fn test_trim_multi_line_inline_value(executor: BackgroundExecutor, cx: &mut TestAppContext) {
+    let variables = [("y", "hello\n world")];
+
+    let before = r#"
+fn main() {
+    let y = "hello\n world";
+}
+"#
+    .unindent();
+
+    let after = r#"
+fn main() {
+    let y: hello… = "hello\n world";
+}
+"#
+    .unindent();
+
+    test_inline_values_util(
+        &variables,
+        &[],
+        &before,
+        &after,
+        None,
+        rust_lang(),
+        executor,
+        cx,
+    )
+    .await;
+}