Add Active Directory integration packages

- Introduced `ad_packages` module for installing necessary packages for Active Directory domain integration, including `realm`, `sssd`, `adcli`, and Samba utilities.
- Created metadata file for the `ad_packages` module to describe its functionality and licensing.
- Updated scenario configuration to include the new `ad_packages` utility.

modules/utilities/unix/authentication/ad_packages/ad_packages.pp

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+include ad_packages::install

modules/utilities/unix/authentication/ad_packages/manifests/install.pp

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+class ad_packages::install {
+  # Active Directory Integration - Realm Management
+  # Manages enrollment and integration with realms (Active Directory domains)
+  ensure_packages(['realm'])
+
+  # System Security Services Daemon
+  # Provides access to identity and authentication remote resource providers
+  ensure_packages(['sssd', 'sssd-tools'])
+
+  # NSS and PAM SSSD Integration
+  # Enables system authentication and name service lookups via SSSD
+  ensure_packages(['libnss-sss', 'libpam-sss'])
+
+  # Active Directory CLI
+  # Command-line tool for performing actions on an Active Directory domain
+  ensure_packages(['adcli'])
+
+  # Samba Common Utilities
+  # Common tools for interacting with Windows/Active Directory
+  ensure_packages(['samba-common-bin'])
+
+  # OddJob - On-demand D-Bus System
+  # Provides on-demand services, including home directory creation
+  ensure_packages(['oddjob', 'oddjob-mkhomedir'])
+}

modules/utilities/unix/authentication/ad_packages/secgen_metadata.xml

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+<?xml version="1.0"?>
+
+<utility xmlns="http://www.github/cliffe/SecGen/utility"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://www.github/cliffe/SecGen/utility">
+  <name>Active Directory Integration Packages</name>
+  <author>Z. Cliffe Schreuders</author>
+  <module_license>Apache v2</module_license>
+  <description>Installs packages for Active Directory domain integration including realm, SSSD, and Samba utilities</description>
+
+  <type>authentication_configuration</type>
+  <platform>linux</platform>
+
+</utility>