fix: Hide switch intent button for Cody Pro users

The switch intent button is now hidden for Cody Pro users while remaining visible for non-Pro users when the experimental one box feature is enabled. This change helps streamline the interface for Pro users.

## Test plan

Manual testing to verify:
- Switch intent button is hidden for Cody Pro users
- Switch intent button remains visible for non-Pro users when experimental one box is enabled

vscode/webviews/chat/Transcript.tsx

@@ -704,7 +704,7 @@ const TranscriptInteraction: FC<TranscriptInteractionProps> = memo(props => {
                 intent={manuallySelectedIntent || intentResults?.intent}
                 manuallySelectIntent={setManuallySelectedIntent}
             />
-            {experimentalOneBoxEnabled && (
+            {experimentalOneBoxEnabled && !userInfo.isCodyProUser && (
                 <SwitchIntent
                     intent={humanMessage.intent}
                     manuallySelected={!!humanMessage.manuallySelectedIntent}