What needs to be done?

Extend the CLI to support list (alias ls) commands for pipeline and pipelinestep, similar to how computecluster and nodepool support listing through list / ls.

Requirements:

• Add a list (alias ls) command to:

  • pipeline → should use the ListPipelines API
  • pipelinestep → should use the ListPipelineSteps API

• Ensure consistent output formatting with other list commands

• Add help text and example(s) in the CLI usage output.

• Add tests coverage for these

References:

• Existing computecluster list and nodepool list commands for behavior and structure.