feat: Add user info module

[paolacernada]

Description

This PR introduces the metal_user_info.py Ansible module, which gathers detailed information about the current user in the Equinix Metal environment.

Changes Introduced

• New Module: metal_user_info.py
  • Functionality: Retrieves user information including personal details, account settings, and associated metadata.
  • API Integration: Fetches data from the Equinix Metal API using the provided API token.
  • Return Values: Returns a dictionary containing user details such as id, full_name, email, default_organization_id, and more.

Closes #137

[github-actions[bot]]

This PR is included in version 0.7.0 :tada: