chore(ios): add team id helper

apps/ios/fastlane/SETUP.md

@@ -22,10 +22,11 @@ ASC_KEY_PATH=/absolute/path/to/AuthKey_XXXXXXXXXX.p8
 IOS_DEVELOPMENT_TEAM=YOUR_TEAM_ID
 ```
 
+Tip: run `scripts/ios-team-id.sh` from the repo root to print a Team ID to paste into `.env`.
+
 Run:
 
 ```bash
 cd apps/ios
 fastlane beta
 ```
-