Add scripts/dist-ios-adhoc.sh and scripts/asc_api.py to build an ad-hoc
signed IPA and the OTA web-install files (manifest.plist + index.html)
for sharing the iOS client with registered devices before TestFlight.
- asc_api.py: App Store Connect API helper (ES256 JWT via cryptography,
urllib) to register device UDIDs and list registered devices.
- dist-ios-adhoc.sh: registers UDIDs, builds the iOS device xcframework
slice, archives + exports with method=release-testing using
-allowProvisioningUpdates, and stages the install files into
dist/ios-adhoc/.
- Document the workflow in clients/apple/README.md; ignore __pycache__.
