Add CLI command group `agents automation-profile` with add, remove,
list, and show subcommands for managing automation profiles that
control plan execution autonomy.
Changes:
- New `automation_profile.py` CLI module with YAML config input,
schema_version guard, namespaced name validation, --update support,
and all output formats (json/yaml/plain/table/rich)
- Register automation-profile in main CLI app
- Add deprecation warnings for --automation-level on plan use and
set-automation-level commands
- Update CLI reference docs with command examples, built-in profiles
list, and deprecation notes
- 26 Behave scenarios covering all commands and error paths
- 9 Robot Framework integration smoke tests
- ASV benchmarks for CLI parsing performance
- Mark A6.cli items complete in implementation_plan.md