Add import/export, configuration summary, and a convenience provisioning
command:
- s3.iam.export: dump full IAM state as JSON (stdout or file)
- s3.iam.import: replace IAM state from a JSON file
- s3.config.show: human-readable summary (users, policies, service
accounts, groups with status and counts)
- s3.user.provision: one-step user+policy+credentials creation for
common readonly/readwrite/admin roles
Hide legacy commands from help listing:
- s3.configure: still works but hidden from help output
- s3.bucket.access: still works but hidden from help output
Both hidden commands remain fully functional for existing scripts.
Also adds a Hidden command tag and filters it from printGenericHelp.
Chris Lu