Adds changeset

Author: pugazhendhi-m

.changeset/seven-kids-return.md

@@ -0,0 +1,10 @@
+---
+"roo-cline": minor
+---
+
+Adds refresh models button for Unbound provider
+Adds a button above model picker to refresh models based on the current API Key.
+
+1. Clicking the refresh button saves the API Key and calls /models endpoint using that.
+2. Gets the new models and updates the current model if it is invalid for the given API Key.
+3. The refresh button also flushes existing Unbound models and refetches them.