New commands: backup, restore, duplicate, env, export, groups, ping — expand the CLI with backup/restore, connection cloning, environment management, export, gr

New commands: backup, restore, duplicate, env, export, groups, ping — expand the CLI with backup/restore, connection cloning, environment management, export, grouping, and latency checks Multi-environment configuration: Manage separate configs per environment with the --env flag; environment name shown in TUI header and logs