Add CLI support for toggling the show_freeze_page service setting,
which controls whether frozen services display an HTML payment page
or return a JSON error response.
Updated 18 SDK implementations + CLI_SPEC.md documentation.
Updated Python, JavaScript, Go, Rust, Ruby, Java, and TypeScript SDKs:
- Add unfreeze_on_demand field to Service struct/class
- Add setUnfreezeOnDemand function to toggle setting via PATCH /services/:id
- Add unfreeze_on_demand parameter to createService function
- Add `un languages [--json]` command to list available execution languages
- Add `un image` command with full image management:
- --list, --info, --delete, --lock, --unlock
- --publish, --visibility, --spawn, --clone
- Update CLI_SPEC.md with new command documentation
- All implementations follow consistent patterns