Use buffer font when rendering editor breadcrumbs and diagnostics (#10488)

Before:

<img width="592" alt="Screenshot 2024-04-12 at 12 00 00 PM"
src="https://github.com/zed-industries/zed/assets/2280405/3251743e-4f2c-4ca3-9bc5-88f37660f7b9">

After:

<img width="673" alt="Screenshot 2024-04-12 at 12 11 37 PM"
src="https://github.com/zed-industries/zed/assets/2280405/6a8ac597-261a-45d9-bf2a-a673b6f26b0e">


Release Notes:

- N/A

crates/terminal_view/src/terminal_view.rs

@@ -861,6 +861,7 @@ impl Item for TerminalView {
         Some(vec![BreadcrumbText {
             text: self.terminal().read(cx).breadcrumb_text.clone(),
             highlights: None,
+            font: None,
         }])
     }