Move motia command to be a subcommand of sdk

[anthonyiscoding]

iii-cli --help

Unified CLI dispatcher for iii tools

Usage: iii-cli [OPTIONS] <COMMAND>

Commands:
  console  Launch the iii web console
  create   Create a new iii project from a template
  sdk      Manage SDKs that are powered by Motia <---new
  start    Start the iii process communication engine
  update   Update iii-cli and managed binaries to their latest versions
  list     Show installed binaries and their versions
  help     Print this message or the help of the given subcommand(s)

Options:
      --no-update-check  Disable background update and advisory checks
  -h, --help             Print help
  -V, --version          Print version

iii-cli sdk --help

Unified CLI dispatcher for iii tools

Usage: iii-cli [OPTIONS] <COMMAND>

Commands:
  motia    Create a new Motia project from a template
  help     Print this message or the help of the given subcommand(s)

Options:
      --no-update-check  Disable background update and advisory checks
  -h, --help             Print help
  -V, --version          Print version