gpui: Add truncate and text_ellipsis to TextStyle (#14850)

Release Notes:

- N/A

Ref issue #4996

## Demo

```
cargo run -p gpui --example text_wrapper 
```



https://github.com/user-attachments/assets/a7fcebf7-f287-4517-960d-76b12722a2d7

---------

Co-authored-by: Marshall Bowers <elliott.codes@gmail.com>

crates/gpui/examples/text_wrapper.rs

@@ -0,0 +1,59 @@
+use gpui::*;
+
+struct HelloWorld {}
+
+impl Render for HelloWorld {
+    fn render(&mut self, _cx: &mut ViewContext<Self>) -> impl IntoElement {
+        let text = "The longest word in any of the major English language 以及中文的测试 dictionaries is pneumonoultramicroscopicsilicovolcanoconiosis, a word that refers to a lung disease contracted from the inhalation of very fine silica particles, specifically from a volcano; medically, it is the same as silicosis.";
+        div()
+            .id("page")
+            .size_full()
+            .flex()
+            .flex_col()
+            .p_2()
+            .gap_2()
+            .bg(gpui::white())
+            .child(
+                div()
+                    .text_xl()
+                    .overflow_hidden()
+                    .text_ellipsis()
+                    .border_1()
+                    .border_color(gpui::red())
+                    .child("ELLIPSIS: ".to_owned() + text),
+            )
+            .child(
+                div()
+                    .text_xl()
+                    .overflow_hidden()
+                    .truncate()
+                    .border_1()
+                    .border_color(gpui::green())
+                    .child("TRUNCATE: ".to_owned() + text),
+            )
+            .child(
+                div()
+                    .text_xl()
+                    .whitespace_nowrap()
+                    .overflow_hidden()
+                    .border_1()
+                    .border_color(gpui::blue())
+                    .child("NOWRAP: ".to_owned() + text),
+            )
+            .child(div().text_xl().w_full().child(text))
+    }
+}
+
+fn main() {
+    App::new().run(|cx: &mut AppContext| {
+        let bounds = Bounds::centered(None, size(px(600.0), px(480.0)), cx);
+        cx.open_window(
+            WindowOptions {
+                window_bounds: Some(WindowBounds::Windowed(bounds)),
+                ..Default::default()
+            },
+            |cx| cx.new_view(|_cx| HelloWorld {}),
+        )
+        .unwrap();
+    });
+}