agent: Create TerminalToolCard and display shell output while it's running (#29546)

Also, don't require a worktree to run the terminal tool.

Release Notes:

- N/A

crates/util/src/time.rs

@@ -0,0 +1,41 @@
+use std::time::Duration;
+
+pub fn duration_alt_display(duration: Duration) -> String {
+    if duration < Duration::from_secs(60) {
+        format!("{}s", duration.as_secs())
+    } else {
+        duration_clock_format(duration)
+    }
+}
+
+fn duration_clock_format(duration: Duration) -> String {
+    let hours = duration.as_secs() / 3600;
+    let minutes = (duration.as_secs() % 3600) / 60;
+    let seconds = duration.as_secs() % 60;
+
+    if hours > 0 {
+        format!("{hours}:{minutes:02}:{seconds:02}")
+    } else if minutes > 0 {
+        format!("{minutes}:{seconds:02}")
+    } else {
+        format!("{seconds}")
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_duration_to_clock_format() {
+        use duration_clock_format as f;
+        assert_eq!("0", f(Duration::from_secs(0)));
+        assert_eq!("59", f(Duration::from_secs(59)));
+        assert_eq!("1:00", f(Duration::from_secs(60)));
+        assert_eq!("10:00", f(Duration::from_secs(600)));
+        assert_eq!("1:00:00", f(Duration::from_secs(3600)));
+        assert_eq!("3:02:01", f(Duration::from_secs(3600 * 3 + 60 * 2 + 1)));
+        assert_eq!("23:59:59", f(Duration::from_secs(3600 * 24 - 1)));
+        assert_eq!("100:00:00", f(Duration::from_secs(3600 * 100)));
+    }
+}