Title: Add expiry support to resource create/update commands

Labels: enhancement, cli, resource

Summary
The CLI currently doesn’t expose Passbolt’s expired field for resources. Add support to set/clear expiry on create and update.

Motivation
Passbolt API supports setting an expiry date for resources. Align the CLI with the API to enable policy-compliant rotations and automation.
Reference: Passbolt API – Create a resource (Resources POST/PUT) https://www.passbolt.com/docs/api/#tag/Resources/operation/addResource

Proposed changes

• create resource: add --expired "<ISO8601>" (set after creation).
• update resource: add --expired "<ISO8601>" and --clear-expired (sets to null).
• Update help text and README with short examples.

Usage examples

• Create with expiry:
  passbolt create resource --name "Prod DB" --password "VeryStrong!" --expired "2025-12-31T23:59:59Z"
• Update expiry:
  passbolt update resource --id --expired "2026-01-15T10:00:00Z"
• Clear expiry:
  passbolt update resource --id --clear-expired