feat: prompt users to run /terminal-setup with yes/no (#16235)

Co-authored-by: Vedant Mahajan <Vedant.04.mahajan@gmail.com>

packages/cli/src/utils/persistentState.ts

@@ -12,6 +12,7 @@ const STATE_FILENAME = 'state.json';
 
 interface PersistentStateData {
   defaultBannerShownCount?: Record<string, number>;
+  terminalSetupPromptShown?: boolean;
   tipsShown?: number;
   hasSeenScreenReaderNudge?: boolean;
   focusUiEnabled?: boolean;