feat(ai-chat): add undo/restore warning strings

Author: abose

src/nls/root/strings.js

@@ -2208,6 +2208,8 @@ define({
     "AI_CHAT_UNDO_TITLE": "Undo changes from this response",
     "AI_CHAT_RESTORE_TITLE": "Restore files to this point",
     "AI_CHAT_RESTORED": "Restored",
+    "AI_CHAT_UNDO_RESTORE_WARNING_TITLE": "AI Undo & Restore",
+    "AI_CHAT_UNDO_RESTORE_WARNING_BODY": "This will only undo changes made by the AI. Changes made outside the AI won’t be restored and may be lost. For full version history, use version control like Git.",
     "AI_CHAT_SHOW_DIFF": "Show diff",
     "AI_CHAT_HIDE_DIFF": "Hide diff",
     "AI_CHAT_LABEL_YOU": "You",