fix: workspace list --role completion and pipeline status alignment (#44, #45)

[rbansal42]

Summary

• Add --role completion for workspace list command #44: Add --role static completion for workspace list command (owner, collaborator, member)
• Align pipeline list long description status values with help text #45: Align pipeline list long description to list all valid status values instead of etc.

2 files changed, 5 insertions, 1 deletion. Trivial fixes.