edit predictions: Preview jumps by animating cursor to target (#24604)

https://github.com/user-attachments/assets/977d08fb-a2b1-4826-9d95-8f35c6cb9f13




Release Notes:

- N/A

---------

Co-authored-by: Danilo <danilo@zed.dev>
Co-authored-by: Smit <smit@zed.dev>
Co-authored-by: Max <max@zed.dev>

crates/ui/src/components/icon.rs

@@ -324,6 +324,8 @@ pub enum IconName {
     ZedAssistant2,
     ZedAssistantFilled,
     ZedPredict,
+    ZedPredictUp,
+    ZedPredictDown,
     ZedPredictDisabled,
     ZedXCopilot,
 }